He is obsessed with boogers. He is (more often that not) caught with his finger up his nose, digging for gold. I don't know if this is a boy thing, a 3-year-old thing, or just my son's idea of a good time, but I think it's gross.
(perfectly good picture ruined by that blasted nose picking)
Here's an actual conversation Nathaniel and I had recently:
Me: Nate, why are you always picking your nose?
Nate: Because I have boogers.
Me: Do you need a kleenex, Nate?
Nate: No, I have this (holds up his finger).
Me: Nate, please stop picking your nose, that's gross.
Nate: That's not gross, it's lish-us.
Me: It's delicious? Really?
Nate: Yes, it's lish-us. Yum!
Me: So if boogers are so yummy, do you want them for dinner?
Nate: No, just for nack (snack!)
Oh. Ok. Thanks for clearing that up for me. :)