Little parasites that hang on the ends of pubic hairs around the testicles and deliver venomous bites that turn the scrotum to mush.
Man #1: Ever get that feeling that you can't even feel your nuts?
Man #2: Um...no?
Man #1: Oh. Um, is that a bad thing then?
Man #2: I would think so.
Man #1: (feels down pants) Holy shit! My nuts are jelly!
Man #2: Seems like you've got the Jonas Brothers, my friend.
Man #1: Oh my god, how could this happen? I was so careful.
Man #2: Did you have sex with that Hannah Montana
girl Miley Cyrus
Man #1: Shit! She told me she was safe!