A childhood belief about history

in 3rd grade, my sister's class was learning about the presidents of the united states. one kid, David, (who, by the way, grew up to be a huge pothead) was confused by the two pictures of Grover Cleveland (the only president to serve two non-consecutive terms) on the poster (which showed all the presidents by order of term). My sister patiently explained to him that the map was actually a misprint, and that the second photo was of Grover Cleveland's twin brother Clover Cleveland, who also served as president. Little David felt enlightened by this information, and when the teacher asked the class "who can tell me about Grover Cleveland", he jumped up in his seat, raised his hand in the air, and shouted out, "ooh, ooh! Those are the twins, right?" The teacher had no clue what he was talking about! We still hang out, and he will DEFINATELY never live it down!