Chapter Text
"Dude, you're not gonna believe where I got my summer internship," Theo boasted, his voice echoing through the frat house's crowded dining room. The buzz of his frat brothers' conversations dimmed slightly as they leaned in, eager to hear his latest conquest.
"Where?" one of them shouted over the din.
Theo grinned, a glint of excitement in his eyes. "At some top-notch pediatric urologist's office. And get this, the doc's an alum of our very own frat!"
The room erupted in a mix of cheers and jeers. "Sounds like you're in for a wild ride," someone yelled, and the crowd roared with laughter. Theo's chest puffed out with pride. Landing a prestigious internship would go a long way when he applied for med school in the fall.
The first day of his internship, Theo walked into the office feeling a peculiar mix of nerves and excitement. The doctor, a fit man in his mid-forties with a warm smile, greeted him with a firm handshake. "Welcome, Theo," he said. "I'm Dr. Castellanos, but you can call me Castell."
The office was surprisingly cozy, with the faint scent of antiseptic mixing with the more pleasant aroma of fresh coffee. The walls were adorned with diplomas and children's drawings, a stark contrast to the rowdy frat house Theo had just left. Castell led him to a small room with an examination table, a few chairs, and a large whiteboard covered in colorful diagrams of the urinary tract.
"So, Theo," Castell began, his eyes twinkling with mischief, "since you're part of the frat brotherhood, we're gonna do things a little differently around here. You're not just going to be watching, you're going to be participating."
Theo's heart skipped a beat. "Participating?"
Castell nodded. "You see, it helps the youngsters to feel more at ease when they know we're all in this together." He winked, and Theo couldn't help but feel a shiver of anticipation run down his spine. Our first patient today is Dax, he’s here because his mom has concerns about how his body is developing. As Theo walked into the room, he couldn't help but feel a pang of nerves. Dax was a shy 10 year-old who was small for his age, with a mop of curly hair.
"Okay, Dax," Castell began, his voice gentle and soothing. "We're just going to have a little check-up today, and Theo here is going to help me out."
The boy's cheeks flushed scarlet as he looked up at Theo, his eyes wide with apprehension. Castell noticed the tension and had an idea. "You know what, Theo, why don't you go ahead and take off your clothes too?" He suggested with a knowing smile. "That way, Dax won't feel so alone, and he'll understand that we're all just here to help each other out."
Theo's eyebrows shot up, but he didn't miss a beat. He knew that frat brothers didn't back down from a challenge. He began to strip off his clothes, revealing his athletic frame to the young patient. Dax's eyes grew even wider as Theo's boxers hit the floor revealing his 5.75 inch cock which was already fully erect in anticipation.
"It's okay, Dax," Castell said, placing a comforting hand on the boy's shoulder. "Theo's going to show you what we're going to do today."
Dax gulped as he tentatively pulled down his white briefs, revealing a penis that was already beginning to stir. It grew before Theo's eyes, the soft flesh swelling into a 7.5-inch behemoth that put Theo's own 5.75-inch cock to shame. The room grew silent, the only sound the faint rustle of fabric as Dax's briefs hit the floor.
"Wow, you're bigger than me!" Theo exclaimed, unable to hide his amazement. Dax looked down at his own erection, his expression a mix of pride and confusion.
"Is that normal?" Dax whispered, his eyes darting between Theo and Castell.
Theo grinned, the excitement in his voice unmistakable. "No, buddy, you are extra special. Your penis is much bigger than most guys, but that’s a good thing. You should be proud of your body, it is amazing in every way." He took a step closer to the boy, his own erection bobbing with each step. "Why don't we compare?" He suggested, gesturing for Dax to come closer.
Dax took a tentative step forward and stepped up on the stool in front of Theo, his curiosity overcoming his shyness. The two stood side by side, their cocks standing at attention. The stark contrast between the two was impossible to miss: Theo's circumcised shaft, a little more than average in size, and Dax's uncut monster, already showing signs of pre-pubescent potential. Theo leaned in closer, inspecting the boy's impressive anatomy with a mix of awe and envy.
Castell cleared his throat, bringing the room back to focus. "Alright, Dax, I'm going to show you how we measure penis size, and then you can help me do the same for Theo. It's all very clinical, nothing to be embarrassed about." He picked up a ruler from the counter and approached Theo, his professional demeanor unwavering. "First, we'll measure the length from the base to the tip when it's erect," he instructed, his eyes never leaving Theo's cock.
Theo's heart was racing as he felt Castell's firm grip wrap around his shaft. The doctor's touch was surprisingly gentle, despite the situation's inherent awkwardness. "Hold him steady, Dax," Castell said, guiding the boy's hand to Theo's penis. Dax's small hand trembled slightly, but he managed to hold on as the doctor took the measurement. Theo felt a strange sense of arousal mixed with the tension of being so exposed and vulnerable.
"Alright, Theo, you're at 5.75 inches," Castell announced. The room felt hot and tight as Theo's frat house bravado melted away. He couldn't help but feel a little self-conscious under the scrutiny of the young boy and his mentor. Dax's eyes widened even further, his own cock seeming to swell at the revelation.
Castell set the ruler aside and grabbed a soft, flexible tape measure. "Now for the circumference," he said, a hint of excitement in his voice. Theo took a deep breath, his erection pulsing in Dax's trembling grip. The tape measure was cold against his skin as Castell wrapped it around the base of his shaft. Dax watched, his eyes glued to the tape as it tightened. The doctor's fingers were deft, and Theo found himself enjoying the sensation more than he'd care to admit.
"Looks like you're at a solid 4.25 inches around, Theo," Castell announced. Theo felt his face heat up as Dax's eyes grew wide with wonder. The boy's own cock bobbed slightly, his grip on Theo's shaft tightening ever so slightly. The doctor's gaze flicked between the two of them, a knowing smile playing on his lips.
"Your turn, Dax," Castell said, and Theo felt his heart thump in his chest. He took a deep breath and reached out, his hand wrapping around the boy's thick, uncut shaft. It was hot and velvety to the touch, and the weight of it in his hand was surprisingly substantial for one so young. Dax's breath hitched as Theo's thumb brushed over the sensitive tip, a bead of pre-cum glistening in the light as it swelled to its maximum size.
Castell took a moment to appreciate the sight of the college student and the young patient in such an intimate embrace before he began his instructions. "Now, Theo, you're going to hold Dax's penis just like that while I measure it, okay?" The doctor's voice was low and steady, the excitement in his eyes unmistakable.
Theo nodded, his grip on Dax's shaft tightening slightly. He felt the boy's pulse quicken, the warm flesh quivering in his hand. Castell stepped closer, his own cock now semi-erect and pressing against his medical scrubs. He took a deep breath and picked up the ruler, his eyes never leaving the boy's cock as he approached.
Castell stepped closer, the ruler held in one hand and a pen poised over the patient's chart in the other. He leaned over the examination table, his eyes focused on the task at hand. "Okay, Dax," he said, his voice soothing despite the thick tension in the room. "We're just going to measure how long your penis is when it's hard."
Theo felt his own cock throb in response to the doctor's words. He watched with bated breath as Castell pressed the ruler against the base of Dax's erection, his thumb gently guiding the shaft to keep it straight. The room was utterly silent except for the sound of the doctor's breathing, the ruler gliding upwards over the boy's skin.
"It's... it's really big," Dax murmured, his voice barely above a whisper. Theo nodded, his eyes never leaving the sight of the doctor's hand and Dax's cock. Castell's fingers hovered just below the corona, the ruler reaching up to the impressive 7.5-inch mark. The doctor nodded, a look of professional satisfaction on his face.
"Now, let's check the circumference," Castell said, his voice a low rumble of excitement. Theo watched as the doctor picked up the tape measure again, his hand steady as he approached the boy. Dax's eyes were still squeezed shut, his cheeks a rosy hue. Theo felt his own cock pulse in response, the thrill of the situation getting to him. He watched as Castell wrapped the tape around the base of Dax's cock, his thumb pressing into the sensitive flesh.
"Keep it tight, but not too tight," Castell instructed, his voice a gentle murmur. Theo could feel the heat of the doctor's body against his, the man's own arousal palpable in the air. The tape measure was cold against Dax's skin, but it didn't seem to deter the boy's erection. It remained rock-solid in Theo's hand, the pulse of blood a steady drumbeat of excitement.
Castell's fingers slid over Dax's shaft, the tape measure tightening until it met the base of his cock. "Looks like we've got a 5.8-inch circumference," he announced, his eyes never leaving Theo's. The doctor's gaze was intense, and Theo felt his own cock throb in response. The boy was so innocent, so unaware of the effect his body was having on the two older men.
"Now, Dax," Castell said, his tone soothing, “ We're just going to get some more pictures for our records." The doctor took several full body shots before he moved closer, snapping photos of the boy's erect penis from various angles. The flash was a stark white in the dimly lit room, painting Dax's skin in a brief, harsh light.
Theo felt his cock throb in his hand as he watched, the sight of the young boy's vulnerability making him feel strangely powerful. He knew he was playing a role in this bizarre medical ritual, but it was hard to ignore the arousal that was building inside him. He stepped closer, his thumb still tracing lazy circles around his own shaft as he stared down at Dax.
“Now, Dax," Castell began, his voice low and steady. "We need to check something else. It's about whether you're starting to make sperm yet. It's a natural part of growing up, and we just want to make sure everything's okay." Dax's eyes snapped open, and he nodded, his expression a mix of fear and curiosity.
The doctor's gaze flicked to Theo, and Theo knew what was expected of him. He took a deep breath and leaned closer to the boy, his thumb continuing to circle the sensitive spot beneath the glans. Castell nodded in approval, his own cock now fully erect and pressing against the fabric of his scrubs. "Good," he said, his voice thick with arousal. "Now, Dax, I want you to watch Theo. He's going to show you how we check for sperm production."
Theo felt his heart pound as he leaned down, his mouth hovering over Dax's cock. The boy's eyes grew wide with surprise as Theo took the thick shaft into his mouth, his tongue flicking against the sensitive flesh. Dax's breath hitched, and Theo could feel the boy's body tense. The doctor stepped back and surreptitiously began to record a video of the encounter. Theo sucked and licked, his own cock straining as he felt Dax's pulse quicken in his grip. The boy's hips began to move slightly, pushing his cock deeper into Theo's mouth.
Theo's hands roamed Dax's smooth, hairless body, exploring the untouched landscape of the young boy's physique. His fingers traced the boy's firm abs, the soft skin giving way to the muscles beneath. Dax's thighs began to quiver as Theo's mouth worked magic on his cock, his tongue swirling around the head, his teeth grazing the sensitive skin. The room was filled with the wet sounds of Theo's eager mouth and Dax's muffled gasps.
"That's it, Theo," Castell murmured, his own cock now fully exposed, stroking in time with Theo's rhythm. "Just like that." The doctor stepped closer, his hand reaching out to gently cup Dax's testicles, feeling the weight and warmth of them. The boy's body jerked at the touch, a soft moan escaping his lips.
Theo's eyes never left Castell's as he bobbed his head, taking Dax's cock deeper and deeper with each stroke. The doctor's hand began to move faster, his grip on Dax's balls tightening slightly as he watched the young patient's reactions. Dax's eyes rolled back in his head, his breath coming in short, sharp gasps as he felt the pressure building. Theo's own hand moved to stroke his own cock, matching the pace of his mouth on Dax's.
"Almost there, Dax," Castell encouraged, his voice a low murmur. Theo could feel the tension in the boy's body, the way his muscles tightened and his toes curled. Dax's hips began to thrust, his cock sliding in and out of Theo's mouth with an increasing urgency. Theo's own arousal was reaching a fever pitch, the sensation of Dax's thick shaft in his mouth overwhelming.
As Dax's moans grew louder, Theo felt the boy's body tense. He knew the moment was coming, the moment they'd both been waiting for. Theo's own hand worked faster on his cock, his thumb pressing into the sensitive spot beneath the head. He felt the pressure in Dax's balls, the moment of no return approaching.
"I'm gonna... I'm gonna...," Dax stuttered, his voice high with arousal. Theo nodded, removing his mouth and using his hand to bring the boy over the edge so that they could observe the results.
"That's right, Dax," Castell murmured, his hand moving to Theo's shoulder. "Let it go."
With a guttural moan, Dax's body convulsed, his cock jerking and spasming. But instead of the hot flood of cum, there was only a dry, pulsing release. Theo pulled back slightly, looking up at the doctor in confusion. "It's okay," Castell said gently, his eyes flicking from Theo to Dax. "That's totally normal for someone your age, Dax. It just means your body's not quite there yet." He gave the boy's shoulder a reassuring squeeze.
Theo felt a strange mix of relief and disappointment. He hadn't realized how much he'd been looking forward to the taste of the young boy's cum, but he pushed the thought aside, focusing on the task at hand. He pulled away from Dax's cock, which was now beginning to soften, and gave it a final, gentle squeeze. "Good job," he murmured, his voice thick with lust.
Castell turned to Dax, his lips curling into a sly grin. "Would you like Theo to show you what happens when you're older?" he asked, his fingers trailing lightly over Dax's hip. The boy's eyes lit up with excitement, and he nodded eagerly. Without hesitation, Dax leaned forward, wrapping his soft, inexperienced lips around Theo's cock, mimicking exactly what the frat boy had done to him moments before.
Dax struggled, his mouth stretching as he tried to take more than the first few inches of Theo's cock. Theo chuckled breathlessly, his fingers threading through the boy's curly hair. "It's okay," he murmured, his hips rocking slightly. "Just focus on what you can take."
Castell leaned over, his breath warm against Theo's neck as he guided Dax's small hand. "Like this," he demonstrated, wrapping Dax's fingers firmly around the base of Theo's shaft, squeezing just enough to make Theo groan. The doctor's thumb pressed Dax's fingers tighter, showing him the exact pressure—enough to feel the pulse of Theo's erection without cutting off circulation. Dax's eyes flicked up, wide with concentration as he matched the rhythm of his hand to the tentative bobs of his head.
Theo tipped his head back, his hips twitching upward as Dax's hot, inexperienced mouth engulfed him. The boy's tongue flicked experimentally against the slit, drawing a ragged curse from Theo’s lips. Castell chuckled darkly, stepping back just enough to capture the moment—his camera angled to frame Theo’s flushed face, Dax’s plush lips stretched around his cock, the slow twist of the boy’s wrist as he pumped what he couldn’t swallow.
Theo’s breath hitched—too close, too fast. He gripped Dax’s hair, gently tugging him off with a wet pop. "Just—ah, fuck—just your hand now," Theo growled, guiding Dax’s fingers to tighten around his shaft. The boy obeyed, sliding his fist faster, his thumb swiping over the leaking tip each time. Theo’s thighs tensed, his abs clenching as the pressure coiled tight.
The first spurt arched high, hot stripes landing across Dax’s cheeks and chin. The boy gasped, eyes wide as Theo’s cock pulsed in his grip, thick ropes splattering his lips, his collarbone, the smooth plane of his chest. Strands clung to Dax’s eyelashes, glistening under the clinic’s fluorescent lights. Theo’s hips jerked erratically, his release painting the boy’s skin in streaks of white, the scent of salt and musk thick in the air.
Dax’s pink tongue darted out instinctively, swiping at the drip clinging to his upper lip—salty, slick, something primal unfurling in his gut at the taste. His fingers tightened reflexively around Theo’s softening shaft, milking out the last drops as Castell leaned in, voice husky with amusement. "That’s semen, Dax. When you’re older, your testicles will produce sperm—tiny cells that mix with this fluid." The doctor traced a sticky line down the boy’s sternum with one gloved finger. "During orgasm, it spurts out just like this."
Theo exhaled a shaky laugh, hips still twitching from the aftershocks. "Damn, kid—you’re a natural," he murmured, thumb brushing a stray drop from Dax’s chin. Then, without hesitation, he leaned down and pressed their mouths together—slow, deliberate, tasting himself on the boy’s parted lips. Dax froze for a heartbeat before melting into it, small fingers clutching Theo’s biceps as the kiss deepened, slick tongues sliding together, sharing the tang of cum and adrenaline.
Theo didn’t stop there. He trailed wet, open-mouthed kisses down Dax’s throat, lapping up every glistening streak—throat, collarbone, the hollow between his pecs—each swipe of his tongue leaving clean skin in its wake. Dax shivered, breath hitching when Theo’s tongue swirled around a nipple, teasing the bud before continuing lower. The frat boy groaned at the taste, hips jerking involuntarily against Dax’s thigh—half-hard again already, cock twitching against the boy’s smooth flank.
Castell cleared his throat, snapping the room back to clinical detachment. "Alright, Dax," he said, brisk but not unkind, snapping off his gloves. "Your penis is significantly larger than average for your age, but structurally, everything’s perfectly healthy." He handed the boy a warm towel, watching as Theo helped him wipe the last traces of cum from his stomach. "Still, I’d like to monitor your development. I’ll recommend your mother schedules quarterly follow-ups."
Dax hesitated, fingers twisting the damp towel. "Will, um..." His cheeks pinked, eyes flicking between Theo and the doctor. "Will all the visits be like this?" The hopeful edge in his voice was unmistakable. Castell exchanged a glance with Theo—something dark and amused—before leaning against the exam table, deliberately casual. "Oh, Dax," he murmured, thumb brushing the boy’s knee. "This was just the basics. Next time, we’ll explore other ways your body can feel pleasure. It’s important to understand all your... functions."
Theo’s breath caught when Castell’s hand slid up his inner thigh the second the clinic door clicked shut behind Dax. "Three months," the doctor mused, fingers skating perilously close to Theo’s still-sensitive cock. "That cock of his will thicken up nicely by then." He leaned in, teeth grazing Theo’s earlobe.
"You’re gonna need to stretch that tight little asshole of yours twice a day so you can take him." The words hit Theo like a physical blow, his cock twitching against his thigh as Dr. Castell dropped the sleek black case onto the exam table with a deliberate thud. Inside, nestled in foam, lay a progression of medical-grade silicone dilators—each one thicker than the last, the final size nearly matching Dax’s obscene girth. Theo swallowed hard, fingertips brushing the cold, tapered tip of the smallest one. "Jesus, Doc," he choked out, "you expect me to—"
"Twice daily," Castell interrupted, "Starting tonight." His fingers circled Theo’s wrist, guiding his hand toward the second size. "By next Monday, you’ll take this one to the base without flinching." The doctor’s voice dropped, rough with promise. "Or I’ll do it for you." Theo’s breath hitched as Castell pressed the cool silicone into his palm, their fingers tangling for a heartbeat too long.
Theo swallowed hard, his throat clicking. "Yes, sir," the words slipping out before he could stop them, too eager. The doctor stilled. a slow smirk curled his lips. "Good boy."