Repeated local hot and cold stimulation before sex can help a man stimulate an erection. Local temperature changes in the vulva have a very direct effect on a man’s sexual response. Men with frequent ejaculation and premature ejaculation may be related to excessive sexual excitement and can do perineal cold compresses before bed or sex, soaking a towel in cold water and then wrapping it around the vulva for a cold compress, changing it every 2 minutes and repeating it 5 times, which can slow down premature ejaculation. Ejaculation difficulties and sexual dysfunction of men are mostly sexual excitement is not high, before sex can be local hot compress, soak the towel in about 45 degrees of hot water, and then the same cold compress repeated 5 times, can promote penile blood circulation, conducive to erection. However, men who have not had children should not use this method for a long time to avoid affecting the sperm production function.