7 incredible scientific things that happen to Your Body When You Kiss Someone

Ever notice how a good first kiss becomes a full-body experience? As Klapow says, "The peripheral nerve endings become more sensitive, which is why you'll feel subtle touches or physical contact that you normally wouldn’t attend to."

It's why there's a rush of energy when your partner touches your back, or why the wind in your hair is electrifying. A kiss essentially makes your entire body hyper-aware — to the point you remember it for years to come.