Is it better for men to wear loose underwear or tight underwear?

Of course, it is better to be generous, especially in summer, because our men's sperm are produced by two balls, and the optimum temperature is 34-5 degrees, which is a few degrees lower than the body temperature. These two balls have the function of automatically adjusting the temperature. When the weather is too hot, the two balls will fall to dissipate heat, and when the weather is too cold, the two balls will shrink into the body to keep warm. Therefore, in hot weather, you must wear wide underwear and trousers to dissipate heat, otherwise it may cause infertility. In fact,