Naked What?

It's been a challenge trying to get anything out of Collin about kindergarten. I'll ask, "What did you do in school today?" He'll reply with one of the following:

"I dunno."
"I forgot."
"....(shrug)"

When I ask him what he learned about he'll say:

"Go look in my backpack."

I don't want to just look at whatever work he brought home. I want him to show me what he worked on. I've been told that it's a boy thing. Ah, well. I'll keep trying. I did manage to get something out of him the other day though. I just wasn't what I was expecting. He said:

"There's this girl in my class and she calls the crayons naked!" (covers his mouth to giggle)

"Why? Are they missing their wrappers?"

"Yeah...and they're naked!" (to which he started busting out laughing)

Boys.