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The penis and scrotum can agreement involuntarily in response to cold temperatures, nervous or nervous stage and participation in athletics.[nine] This reduce of flaccid penis sizing is referred to via the slang phrase "shrinkage", as a consequence of action with the cremaster muscle. A similar phenomenon has an effect on cyclists and workout bike

Scrotum: Its position is to manage the temperature of your testes. It’s lined with smooth muscle mass that contracts and relaxes to pull your testicles close to The body to keep them warm or allow them to fall absent and funky off.These coverings assistance secure the penis and assistance maintain an erection by stopping blood from leaving the er