only a boy.

Only a boy can go to sleep in perfectly good condition...



And wake up with a black eye.



And when you ask how it happened,



Only a boy will say, "I don't know."



I mean, how can you "not know" how you got a black eye.



Further more, what goes on after the lights go out in a room with two boys?



I guess that's an answer that only a boy knows.

Boys.  Only boys.