A new wave of research is challenging long held beliefs about male fertility. According to findings from the University of Oxford, male masturbation may actually improve fertility through what scientists call the sperm Male Masturbation: Over 567 Royalty Free Licensable Stock Illustrations & Drawings Shutterstock A frequently shared study from 2003 found men's testosterone levels increased around the seventh day of abstinence, with researchers observing a temporary spike of roughly 45 percent compared to baseline levels. However, Guide to Creating an Ideal Private Space for Male Masturbation MYHIXEL.com