One of the easiest ways for a person to express his love for his loved one is precisely the kiss – a universal language that does not need translation to get the message across. In addition to being pleasurable, kissing has health benefits that have been documented in various medical studies. It also has a positive effect on life expectancy. It has long been a well-known fact that kissing burns calories. A one-minute passionate kiss burns about 6.4 calories. Therefore – kiss at will and waste energy. Research shows that those who kiss their partner goodbye every morning live 5 years longer than people who don’t. Psychologists claim that kissing provides self-esteem, makes us feel valued and helps a good state of mind. Passion during a kiss stimulates the production of hormones such as serotonin and oxytocin, which helps relieve stress, release tension, reduce negative energy and achieve a sense of well-being. While kissing, 30 facial muscles are activated. The more time we devote to the pleasant activity, the longer we will keep the facial skin tight. The tension in the muscles caused by a passionate kiss helps to smooth the skin as it increases blood circulation. The kiss also stimulates the immune system. When two people kiss, they exchange saliva. Some doctors believe that the exchange of body fluids affects immunity. The immune system is activated to detect possible bacterial agents introduced with the partner’s saliva. It has been scientifically proven that frequent kissing contributes to the stabilization of cardiovascular activity, reduces the risk of high blood pressure and cholesterol. Kissing increases the release of adrenaline, which causes the heart to pump more blood. It is believed that those who give frequent kisses to their loved ones are less likely to suffer from gastrointestinal disorders, bladder problems and blood infections .