While you're no doubt aware of the fact that mackerel, wild salmon, halibut and sardines are stellar sources of omega-3 fatty acids, you may not know the connection between steamed fish and a steamy night of passion. Essential fatty acids improve circulation by clearing cholesterol and platelets from artery walls and keeping the blood flowing. The omega-3s in fish also maintain hormone function and may raise dopamine levels in the brain to prime you for arousal. Finally, research has shown that when people switched from a typical Western diet (high in processed food, salt, sugar and fat) to a Mediterranean way of eating, it boosted their interest in sex. The study didn't single out fish (it focused on the diet as a whole, which also included nuts, olive oil and fresh fruit and vegetables), but it was likely a factor.