A circle walks into a bar. The bartender sees him, and waves, then shouts to the whole room, "another drink for everybody - on this guy!" Everybody in the pub cheers.
But the circle is not happy. Frowning, he marches up to the bartender. "What the eff, dude? Why are all the drinks on me?" , the circle angrily demands of the bartender.
The bartender replies, "hey, don't get mad, circle buddy. It's just ... you're round!"