Testicles Are Cool

An odd feature of most mammals is descent of the testes. Testes migrate from a protected position by the kidneys to end up in pouches outside the body cavity. Many attempts have been made to explain this strange development, ranging from the pull of gravity through sexual display to avoiding concussion. In fact, the lower temperature in the scrotum provides the key.read more
Source: Psychology Today Sex Center - Category: Sexual Medicine Authors: Tags: Animal Behavior Evolutionary Psychology Sex Source Type: news