2, when kissing, the human body will be in a state of tension, which can promote blood circulation, prevent wrinkles and make the skin smoother.
3, when kissing, both sides will secrete saliva, which can effectively prevent tooth decay.
When kissing, the saliva of both sides will exchange to produce an antibody to enhance immunity.
When kissing, a hormone will be secreted, and the saliva produced will also produce an antibiotic, which can play an analgesic role.
6. People will burp if they eat too much. At this time, the most effective method is kissing, which can stop hiccups for half a minute.