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The male reproductive organs are designed to be outside of the body so that it is kept at 2 degree Celsius lower than our body temperature. Only when they are kept at a cooler temperature, the sperm produced will be of better quality. Other than affecting the quality of sperm, the quantity is affected as well. When the temperature of the male reproductive organ rises above 35 degree Celsius, it is deemed too hot for them to produce adequate sperm, leading to low sperm count.