I had a sub in my human sexuality class a while back.. Happened to be the guy who teaches the Sociology of Marriage and Family class. I can't remember which country it was, but he said that in some areas of the world, when the father of a family dies, the oldest son is to eat his genitals.
Apparently, in that culture, it is believed that eating the genitals of your parent gives you their knowledge and wisdom and such. When the mother dies, the oldest daughter is to do the same thing. I wish I could remember what country it was. All of this was seriously told to us, so please, don't think I'm yanking anyone's crank. I don't think I'd want to eat my mom's bits though, personally.