From the “Kiss Me” messages on tiny candy hearts to romantic songs on the radio, a kiss is probably on your list this Valentine’s Day. Before cozying up to your loved one this year, make sure your mouth is in good health because, as it turns out, a kiss is more than just a kiss.

Kissing stimulates saliva, which can help fight cavities. However, if the person you’re kissing has poor dental and overall health, you run the risk of getting unwanted germs, illnesses or diseases instead of candy, flowers or cards this Valentine’s Day.

Here’s what you need to know about making your smile a vision of love for February 14.

Cavities Can Be Contagious

Whether through kissing or something as simple as sharing a fork, the bacteria that causes cavities can spread to another person. Brush twice a day for two minutes and clean between your teeth once a day for cleaner kisses and a cavity-free smile.

Beware Bad Breath

Bacteria is a big culprit of bad breath, so regular habits like brushing and flossing are especially important. Other ways to stay fresh are over-the-counter antimicrobial mouthwashes or chewing sugarless gum. Both can freshen your breath instantly and get saliva flowing—especially after you eat foods with a strong scent. (And look for the ADA Seal of Acceptance on both!)

Share a Life (But Not a Toothbrush)

For many couples, a big relationship step is keeping a toothbrush at each other’s place. Just make sure you each have your own because sharing toothbrushes also means sharing germs.