"The Brain men and women" - Einn fyrir stelpurnar

A Girl was in the hospital, her parents sat waiting in the waiting room...finally the doctor comes out. Both parents jump up, and the whole room watches. "Is it serious?" the mom asked. "She needs a brain transplant" the doctor replies. Both parents stand silent for a moment...then the father asks, "How much is it gonna cost?"
The brain? Girl's are 450 dollars, and boy's are 5,800dollars"
All the men in the room seem to chuckle to themselves, then finally the father brings himself to ask, "Why are the boys more expensive than the girl's?" THe doctor looks at him and replies, "We have to mark the girl's down because they're used."