3. It Can Relieve Pain
The same blood vessel dilation that helps reduce blood pressure can also relieve pain. Although kissing can help with all sorts of pain, it really helps relieve headaches and cramps.
4. It Helps Your Tooth Health
When you lock lips with someone, you start producing more saliva — as you do anytime you move your mouth more (like when you eat). The extra saliva you secrete when kissing can help wash away cavity-causing plaque on your teeth.