Will thinks stinky things are funny, I'm so proud.
He actually does this all the time. Often when we're in the car, since I assume there's often not much else to do but to play with his feet. So he'll work to get both shoes off, then pull his feet up to his nose, sniff them, and loudly proclaim how stinky or yucky they are. Then he'll look at me, point his toes and say "dada?", as in dada, it's your turn to smell my feet. I always do.