If anyone has taught human anatomy and physiology, he knows that everything in the body is interconnected. So, if you pull the hair on your ass, then for some reason tears flow from your eyes. But if a guy pokes a finger into the pussy of a beautiful sleeping blonde, then very soon she sucks his penis and spreads her legs for sex. Well, it would seem purely physiology, but on the other hand, if it were terrible like an atomic war, it is unlikely that sex would be so hot and passionate!
