Trying to heat things up after your dinner date? Be sure to order the wild salmon. The fish is a good source of omega-3 fatty acids, which aid nitric oxide production, helping you stay hard. Plus, additional research has found that cutting back calories and sticking to a Mediterranean-style diet rich in produce, fish, whole grains, and healthy fats (like omega-3s) can improve erectile function in men with metabolic syndrome. Just make sure you’re ordering the right kind by reading this special Eat This, Not That! report on The 8 Reasons Why You’re Eating the Wrong Kind of Salmon.