"Mommy, what were you doing bouncing on Daddy's stomach last night?"
"I have to do that, or Daddy's belly gets very fat. Bouncing keeps him skinny."
"That's not going to work."
"Why not?"
"Because the babysitter keeps blowing him back up again."
I had the best Dad moment last night... *actual conversation with my 8 year old*
Son: Dad... how many kidneys do I have?
Me: Two. You have two, son.
Son: Nope... I have four. *point to belly* Two kidneys here... *points to legs* ...and two kid knees here!
The student has become the teacher.