Research shows that the act of smooching is good for your teeth, helps circulation, boosts the immune system, and can be good for the skin. When we kiss, our bodies release chemicals called endorphins. Endorphins are hormones produced in response to pain and vigorous exercise. Both of these activities trigger those familiar feelings of euphoria. Endorphins help control the level of stress hormone (cortisol) in the body. Too much cortisol is bad for your health. It can cause acne outbreaks, thinning of the skin, and slowing down of the natural healing process. This can further irritate your skin and may increase the scarring caused in areas affected by blackheads and whiteheads. Increased cortisol can also trigger Eczema, rosacea, and psoriasis. So anything you do to bring those cortisol levels down must be a good thing for your skin. Those cortisol reducing endorphins also act as natural painkillers – which may help alleviate some of the discomfort associated with acne. Endorphins can also help improve your ability to sleep which in turn reduces stress. Kissing can also trigger the release of oxytocin, dopamine, and serotonin ,all helping highen the pleasure of a kiss and encourage bonding between couples. Kissing is like keep-fit for your face. When we kiss, especially passionately, we give our facial muscles a workout. A tongue-tangling French kiss is a great workout that enlists an army of about 30 facial muscles and burns about 20 calories a minute. Kissing also increases blood flow to the face. Kissing can boost the immune system. Studies have shown that increasing the variety of bacteria in our bodies correlates with improved health. Given there are hundreds of different types of bacteria in our mouths, kissing can introduce new bacteria to the body – boosting your immune system response in the process. I healthy immune system is critical to avoiding some of the symptoms of acne. Your immune system plays an important role in maintaining skin health – your skin being one of the main barriers to preventing harmful pathogens from entering the body. Kissing can also help lessen allergic reactions – helping provide relief from hives and allergies to pollen (hayfever) and household dust mites.