The quintessential aphrodisiac, and for good reason. It's full of phenylethylamine (PEA), the same chemical your body releases during sex; it also sparks dopamine production. Just like sex, chocolate can be very addicting, causes immense pleasure, and tastes good anywhere, on anything. More or less. Dark chocolate has more of the good stuff, so if you're looking for a new color to paint your mate, the darker the better.