The amount of ejaculations included those from sexual intercourse, masturbation and nocturnal emissions (from wet dreams). The one study found that men who ejaculated 21 or more time a month had a 33% decreased chance of developing prostate cancer compared to those who ejaculated 4-7 times a month. Rupture or fracture. An injury can rupture or tear the tough, protective covering surrounding the testicle and damage the testicle. This is called a testicular rupture or fracture.