Flap, Flep, Flip and Flop are related to each other, but not incestuously.

Among the four are Flap's mother, Flep's brother, Flip's father and Flop's daughter, and the oldest and the youngest are of opposite sex.

One is a different sex from the other three: who?

Flop(m) is the father of Flip(f), and the older brother of Flep(f).  Flip is the mother of Flap(f), and the daughter of Flop.  So: Flop(m) is the oldest, and Flap(f) is the youngest.

Posted by trey on 2005-07-04 04:23:25