“It’s quite easy to understand how this works, Master.” Sebastian said as he swept his lips over the sweet skin of his Master’s hips.
“When a stimulus is applied, the body responds in a certain way, which is quite expectedly, predetermined.” Glove encased fingers swept lower to a much harder spot and Ciel moaned loudly.
“That is exactly the kind of reaction I was talking about. Now if the nervous terminations are over stimulated, not only the reaction is stronger but…”
Ciel did not manage to hear the rest of the sentence as Sebastian took him whole is his mouth.