My anthropology professor in college was this 75 year old man who loved to tell us about a tribe (in Africa I believe) that had a saying: "Women are for children, boys are for fun, and ripe watermelons are for true pleasure." He used to have a big ol' chuckle when he told us, and I think he was half senile so he would always forget he had already told us and tell us again the next week.
No, that was Afghanistan again. I forget the name but it was documented by some traveler and chronicler throughout the middle east in the 1800s, though variants exist throught different persian and arabian areas. (If you get the qoute right and google it you can find the wiki article for the name of the dude who documented it)
It's sort of a self-deprecating humor, knowing how many boys gets raped in their culture, mixed in with how much Afghans love there watermelon.
I saw plenty of this while there, though I was in a much more liberal area so it didn't occur that much. Some of the kids remembered when the Taliban trucks would drive through the area and they would all have to go running home or risk getting snatched up and spending the night getting buttraped on the truck.
The dancing boys of Afghanistan is a good documentary to watch on this phenomenon.