by POPSUGAR Sex & Culture 8

Scientists are now advising professional male cyclists to freeze their sperm before they begin their careers. It seems that the rigorous training causes a dramatic drop in sperm quality. Factors like heat from the tight clothing, friction of the testes against the saddle, and stresses on the body from the physical demands of the sport could all be responsible for the increased risk of infertility.

Over the years I've heard a lot of reasons for male infertility. I decided to do a little research and I've rounded up some lifestyle practices that can lead to it. (I've added a few fake examples, too!) Find out if you can spot the real from the fake and be sure to tell all your guy friends how to spare their sperm!