Flashback: Overcome by instinct

Adam can not help it, he is drawn in by his sister huge cock. Its tip is already leaking precum, which emanates an intoxicating scent. Without him even realizing it, he had extended his hand, and was only an inch away from touching a real cock for the first time. He hesitates for a second: Fuck! What am i doing?

But his hand continues to move on its own, urged forwards by his **** desires, his fingers closing around Sarah's cock. And then he can feel it: Hard and warm, its veins pulsing with blood and power. Too thick to even encompass with one of his hands alone. Its angry red head leaking precum, its scent increases Adams arousal and clouds his senses. He moves in his second hand and starts to stroke the shaft, making it twitch, and Sarah moan.

And at this moment, he realizes:

All these fantasies about big cocks. The pictures of astonished girls in front of big cocks. The porn movies of girls stroking big cocks, of girls being fucked by big cocks. Adam doesn't care for having a big penis himself. He just cares for a huge cock. He wants to be the one to gaze upon a huge cock. He wants to stroke a huge cock. He wants to be slapped by a huge cock. He wants to suck a huge cock, to gag on a huge cock.

He wants to worship Sarah's huge cock.