I have learned other exercises, but it's ok. It is easy to play with testicles, such as tenderness, pinching testicles, rubbing testicles and patting testicles. As we all know, testis is very fragile, so it is easy to cause inflammation, swelling and testicular fissure. It is mentioned that this can improve the secretion of androgen. Is there a relationship between physical stimulation and endogenous hormone secretion? Anyway, I don't think I have money. You might as well take supplements. It is right to rub your testicles gently like a baby before going to bed. The function is to promote blood circulation and relax testicles once every three or two days.