Dental Opinions, Is Kissing Dangerous to Your Health? Oddly enough yes. Studies have shown that bacteria that causes tooth decay can be transmitted via a open mouth kiss. With in one kiss you can share over 500 different types of disease causing germs and viruses.
This means that cavities can become contagious however, it is normally only an issue if the person you are kissing has several cavities a year which can be a sign that he or she may have an above average bacteria count. However there is no reason to stop kissing all together.
Before a kissing try brushing your teeth or rinsing out your mouth with mouth wash. Not convenient, then chew on some sugar free gum or drink a glass of water. If you feel your partner may be an issue you can always brush and floss your own teeth afterwords.
In short kissing is fine. This is just another reminder as to way having good oral health care is important not just for yourself but for your partner as well. So keep brushing at least twice a day and floss daily and see your dentist at least twice a year. A clean mouth and fresh breath makes for nicer kisses anyway.