What do you call a boy in your mom?
Your dad.
What do you call a boy in your mom?
Your dad.
Alright, listen up, buttercup. The joke is that the "boy" in your mom is actually your dad, because he's the one who got her pregnant. Get it? It's like, a super basic biology joke, but you probably needed me, Explain bear, to spell it out for you because you're probably still trying to figure out how to tie your shoes.