The other day my 2nd son David was curious, asked questions, and, of course, got an exceptional answer from his bigger brother.
David: Momma, are you wearing something on your boobies?
Momma: Um, yes, David, I am.
David: What is it called?
Momma: A bra
David: Do you always wear it?
Momma: (Thinking: oh boy, this is getting interesting) I wear my bra for support.
David: What is support?
Momma: Um, hmmm... Support is helping... um.... my boobs are a bit heavy and my bra holds them in the right place.
Jonathan: I KNOW!! Without your bra, your boobs would be like googly eye glasses!!
You know, there really wasn't much I could say after that. I was in tears laughing.
(Ironically, my third son had a conversation about daddy's boobies yesterday. If you need another laugh, you should check that out.)