Ds and his friend (both 7) have been having a lengthy discussion while watching the football, I haven't been listening.
... "Mummy? Mummy? It can't happen, can it"
"What, dear?"
"If you were having a baby and the poo came out at the same time and the baby could get poo on it."
"Oh yes, dear, it happens quite often, actually"
. "Really?"
"Yep"
"Uuugggh that's disgusting, I am so glad I am not having a baby in my tummy...."
I've scarred them for life haven't I? :)