Drinking coke in large quantities for a long time will kill sperm, because coke contains phosphoric acid, which is a medium-strong acid. The solubility of phosphoric acid in the intestine is very low, which will reduce the absorption rate of trace elements such as calcium, zinc, iron and copper in the digestive tract. In the process of spermatogenesis and sperm maturation, a large number of trace elements zinc and calcium are needed. Zinc and calcium deficiency will affect sperm motility and sperm quantity. Therefore, drinking a lot of cola for a long time will lead to the lack of trace elements such as calcium, iron and zinc in the body. The lack of trace elements will affect sperm production and sperm motility, and also affect reproductive function. So coke kills sperm.