In 2009, People for the Ethical Treatment of Animals (PETA) tried to show a commercial during the Super Bowl that declared, "Vegetarians Have Better Sex." The ad was deemed too racy to air, but the advocacy group may have been on to something. When Lynn Fischer wrote her book "The Better Sex Diet," she praised a mostly vegetarian diet as a way to keep maximum blood flowing to the genitals.
Vegetarians and vegans tend to have lower cholesterol levels than people who eat meat, as animal products are loaded with cholesterol-raising saturated fats. There are, of course, exceptions to this rule -- a vegetarian who tends to take his vegetables fried won't be much better off than a person who enjoys steak every once in a while. But doctors and sex therapists agree that you are what you eat, and a healthy diet will help keep your sex life healthy as well.