Sassy - I'm Gay.
Me: What do you mean by "gay"?
Sassy: I don't want to have sex with boys.
Me: Do you want to have sex with girls?
Sassy: No?! (with a face of confused revulsion)
Me: Then you aren't gay, you're Celibate.
Sassy: What's celibate?
Me: When you don't want to have sex with anyone.
Sassy: Ok. I'm Celebrate.
The next day...
(We're watching TV for about an hour when suddenly...)
Sassy: You lied to me!!
Me: (confused) About what??
Sassy: You told me - You. Told. ME that boys don't get a puberty. Tom (her newest best friend) told me boys do.
Me: I'd never tell you boys don't have a puberty. Of course boys have a puberty or they'd never become men. (This went back and forth a bit with a "No I didn't" "Yes you did!" theme) I may have told you boys don't have a period...
Sassy: What's a period again?
Me: (finding strength) When you start getting the monthly bleeds.
Sassy: Oooooh. That might be it. Sorry Mummy. (moment of thought) Tom told me boys get a puberty and that white goop comes out of the end of the penis.
Me: (I want to strangle Tom) That's the male body making sperm so they can make babies.
Sassy is then completely disgusted and changes the topic to the safety of Pokemon.
I'm still having palpitations.