I’m not sure an adolescent is going to care about the ethics of this- he thinks he has found a genius life hack! Maybe telling him that he is working on the best, quickest way possible to become the world’s shittiest lover will do the trick. He’s going to get with the girl of his dreams, start his little selfish routine, and blow his load early, embarrass himself and get a reputation as a lousy lay. Then he can be one of these guys who marries someone he’s not attracted to yet got pregnant and writes in when he’s 30 about his boring wife who doesn’t want to have sex with him.