Bad Teeth Are Contagious

Don’t make out with someone who has cavities:

Just as a cold virus can be passed from one person to the next, so can these cavity-causing bacteria. … “In one instance, a patient in her 40s who had never had a cavity suddenly developed two cavities and was starting to get some gum disease,” [a dentist] said. She learned the woman had started dating a man who hadn’t been to a dentist in 18 years and had gum disease.

Or, if you have gum disease and haven’t been to the dentist in 18 years, don’t tell anyone.