“You cool off and get your mind right, Little Chef.”
It's very wise rather than incredibly stupid design flaw to have a man's privates hanging right out in the open in an absurdly vulnerable manner. Having the testes outside the body makes them the ideal and cool spot for sperm. Essentially the temperature is affected by the air temperature around the scrotum. In order to be in perfect working order sperm need to be cool, a few degrees below body temperature.
The testes originate within the abdominal cavity and in humans descend into a scrotum only after the birth. If a testis does not descend normally into the scrotum, it is damaged by exposure to the temperatures normally found within the abdomen, and individuals are invariably sterile, although enough androgens are secreted to ensure that they have male characteristics and behavior. Subject the human testes to normal body temperature and sperm production is reduced.
Because of the countercurrent heat exchange function of the blood vessels in the spermatic cord, the testes are kept at a uniform temperature throughout. If the male mammal is placed in a hot environment and evaporation of sweat from the scrotal skin cannot keep the scrotal skin cool, then the testis warms up. Younger men more easily regulate and restore their normal scrotum temperature than older ones.
The scrotum regulates temperature by altering the position of the testicles, either closer to or further away from the body wall, depending on the environmental temperature. The dartos and cremaster muscles contract in cool temperatures and relax in warm temperatures to bring the testicles closer or further from the body wall, respectively.
• The scrotum and the pampiniform plexus control testicular temperature through vascular exchange.
• In warm and hot environment (above 35°C or 95°F), the many sweat glands in the scrotal skin provide for evaporative heat loss. The dartos and cremaster muscles relax to allow the testicles to hang further away from the body wall, moving them further from the higher core temperature of the abdominal cavity. This relaxation also allows the spermatic cord to stretch out, resulting in a longer time for blood to pass through the pampiniform plexus, thereby allowing more cooling of the blood to occur.
• In cool and cold environment (below 32°C or 89.6°F), there is no sweating on the scrotal skin and the tunica dartos and cremaster muscles contract. This contraction pulls the testicles closer to the body wall (exposing the testicles to a higher core body temperature). This action effectively shortens the spermatic cord and pampiniform plexus, thereby decreasing the transit time of the blood through the cord and so reduces the alterations in the temperature of the blood as it passes through the cord.
Testicles and heat
Balls in an oven
Balls' cooking advises
Balls' eating advises
