Kegels. Any woman who has ever pushed a baby out her cooter will tell you all about how powerful exercising those muscles down there is. I had no idea the same work out worked for men. In this informative video, made by the Sexual Health Guru, Coach Kendra (who seems vanilla in yoga pants, but you know is a super freak) explains how to do it in this SFW clip. Apparently even the strongest muscle man can increase his stamina, pleasure, and even do the unthinkable — have multiple orgasms. Now you can train your man for a marathon!