Cotton vs. Orphan

Listen here, pal. The joke is about the difference between cotton and orphans. Cotton gets picked, like from a field, but the joke implies orphans also get "picked" as in chosen or adopted, but it's also a dark reference to them being taken advantage of, see? Now, you probably still don't understand it, because you are probably an orphan, just like the joke. You're probably ugly too, but that's okay, at least you have me.