Do you understand the world oldest known joke?

Question

Something which has never occurred since time immemorial: a young woman did not f**t in her husband's lap. -- 1900 BC to 1600 BC, Sumerian Proverb Collection 1.12-1.13

Answer 1

a girl just asked that 4 questions ago!

and no i don't get it

Answer 2

Because it wasn't a f**t that he felt on his lap it was a baby coming out.

Answer 3

It's funny because it's about farting.