This is a joke in that classic joke tradition, the guys walking into a bar.
Try this one on for size...This guy walks into a bar, and as he walks up to the bartender the bartender notices the guy has a frog on his head. As he gives the guy his drink the bartender says, "I gotta ask. Where did you get that thing?" And the frog says, "I don't know. It just grew on my butt one day, and I've kind of gotten used to it." Thank you, you're beautiful!