Does any1 kno what happened 2 dean's hand in s5 episode 'i believe children r our future'. I cudnt understand dat, plz tell me

ahahaha I actually had to look it up after the episode too. Apparently theres an old saying that if あなた masturbate, あなた will get hairy palms, as a way to deter kids from it. If あなた remember at the hospital, Dean was checking out a nurse, and later when he shows Sam his palm, he says, "I was bored, the nurse was hot." and あなた can guess what he probably did. Sam responds によって saying, "you know あなた could go blind," which was another thing they used to say about those who masturbate.