You saw this bulge on a guy in the changing room. You glanced and an overwhelming urge to look at it again swept over you. The guy seemed to be taking ages to cover up his bulge and you couldn't work out why, but eventually you gave in and looked again at his bulge. That was your last act of free will. You looked and couldn't stop looking at his underwear bulge as he walked over to you, pushed you to your knees and shoved your face into his bulge. Whilst you were there taking in his musk, his bulge in your face, and your hard cock straining in your gym gear, he said "Good cockslut. Since a teen I've known that my cock is hypnotic and a glance at my bulge is all you need to be controlled by it. Now you've smelt my musk, you're as good as mine. However there is one last thing we must do so your mind and body become my possession. Open your mouth". You obey and open. He released his now hard cock and proceeded to fuck your mouth as you knelt there helplessly taking in his musk and taste of his cock, your precum patch visible through your jockstrap and gym shorts. The guys thrusting got more and more intense, his balls slapping against your chin and eventually, he ordered you to cum. You both came at the same time, him coating your throat, and you filling your jockstrap with cum. That was it, you were now his willing, submissive cockslut.