It Can Take Away the Big "O"

"Being overweight for both men and women will cause decreased blood flow in their genitals because the extra weight causes their blood vessels to narrow—and proper blood flow is crucial in order to reach an orgasm," says Radcliffe. But being too thin can also have adverse effects on your ability to climax. "[Too little body fat] can affect testosterone and libido levels," Radcliffe continues. "Those sex hormones need to be in balance in order to have any kind of sexual drive and are necessary in order to achieve an orgasm."