5. Libido Food: Watermelon

So if you're really looking for a sweet libido-booster, stick to a slice of watermelon. Although it's 92 percent water, that remaining 8 percent of fruit is jam-packed with vital nutrients for sexual health. Researchers at the Texas A&M Fruit and Vegetable Improvement Center reported finding in 2008 that watermelon has ingredients that delivered Viagra-like effects to the human body's blood vessels and could even aid in increasing libido. Watermelon contains a phytonutrient called citrulline, which the body converts to arginine, an amino acid that boosts nitric oxide levels in the body, which relax blood vessels in the same way a medicine like Viagra does.