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Why are mens testicles on the out side?

Updated: 8/17/2019
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15y ago

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It has to do with temperature control. The scrotum acts like a thermostat, regulation the temperature of the sperm. You may notice that in cold water, the scrotum retractst the testes closer to the body. The reverse happens while exercising or sweating. Sperm cells survive best in just under body temperature. If the testicles were inside the body there would be no form of temperature regulation.

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15y ago
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Q: Why are mens testicles on the out side?
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