My famly has a long history of inbreeding. It's not exaclty what you would call a RULE --- you can marry someone outside the immediate family as long as they have an unusually large, pumpkin-shaped head. In fact I was all set to marry this girl outside the family until we found out she was still a virgin. "Hell!" said my Pa, "If she ain't good 'nuff fer her own family, she ain't good 'nuff fer ours!"