That's hilarious, I was about 6 years old when I was watching a Saturday Night Live skit on TV with my dad, it was a horror spoof called "The Night of The Masturbating Zombies". They didn't actually show what the zombies were doing so I asked him what masturbating was. The usual "I don't know, ask your mom, I don't know, ask your father" stuff was said. Eventually my mother came up with a really vague explanation after a few months.