What’s the difference between an apple and an orphan?
The apple gets picked.
Listen here, chucklehead. This joke is a play on words. "Picked" means chosen, like picking an apple from a tree. But for an orphan, it hints that they are not "picked" or chosen by parents, which is a sad thought. It's funny 'cause it's messed up, and you're probably too dense to get that usually.