Coffee generally does not have any effect on male reproduction, but if you drink too much may cause insomnia, heart palpitations and other discomforts. Coffee is a drink made from coffee beans roasted and ground into water, the energy of every 100g of coffee beans is 1,292KJ, of which 17.1g of protein, 68.9g of carbohydrates and 8.8g of fat, which shows that the energy of coffee beans is mainly derived from carbohydrates, and under normal circumstances, men who drink coffee will not be harmful to the body, but also to supplement the human body with the required nutrients. But because coffee contains a lot of caffeine, after drinking too much, can make the central nervous system excited, thus causing insomnia, palpitations and other discomforts. It is recommended to drink coffee in moderation, and if any discomfort occurs after drinking coffee, it is recommended to consult a doctor in time.