If the person doesnt brush and floss regularly, their mouth is teaming with harmful bacteria, called plaque, that causes tooth decay and gum disease. Plaque can be transferred through exchanging saliva, so kissing someone who suffers from periodontal disease will increase your need to brush and floss regularly.

Is it safe to kiss someone with a tooth infection?

The main bacterium that can be spread from person to person via saliva include Streptococus Mutans, Actinobacillus Actinomycetemcomitans, and Porphyromonas Gingivalis, which will only be present in those with active tooth decay or infection.

Can you kiss someone with bad breath?

Kissing is actually good for your teeth. The anticipation of a kiss increases the flow of saliva to your mouth and gives your teeth a plaque-dispersing bath. Bad breath cant be passed on to another person via kissing.