If you have supply, create the demand

Did you know ... that the Sambia of New Guinea think that semen isn't created by the body? Rather, they believe older men must supply the young, and so boys regularly ( Are you a guinea pig? )

UPD:
Kung bushmen believe "if a girl grows up without regular sex, she will lose her mind and end up eating grass and dying."

I need a girl like this in my backyard.