Brad has nothing to do with anything. Which is why it's so humiliating how often he shows up when Albert tries to do the thing, the closing your eyes and clearing your mind thing Bernard taught him.
It's as if the fucker's just lurking there in his brain, waiting for a lull between thoughts, for a chance to come out and taunt Albert. What's worse is the number of times Albert gives up on the thing altogether and ends up jerking off to thoughts of the lying bastard.
Albert's beginning to hate his subconscious as much as he hates Brad.