Sign Language

So I'm sitting on the couch writing some notes for my Sociology class when Parker comes over and sits down.

Me: Do you need something Parker?

Parker: I was just wondering if you had any brothers and sisters.
Me: You know your 2 uncles, those would be my brothers.

Parker: So you don't have any sisters?

Me: Ummmm. No. No sisters.

Parker: Oh. Ok

*Now I'm curious*

Me: Why did you want to know if I had any sisters?

Parker: Because I thought if you had a sister and she was deaf she could like, you know, teach me sign language.

*Where in the world do they come up with these things?*