Kissing is pretty safe. Herpes is the only sexually transmitted disease that can be passed through kissing. This usually happens when one person has an open sore on the mouth, lips or tongue and then kisses another person. So the message is simple: Don’t kiss someone with open sores. And, if you have any sores, keep your tongue to yourself until they’ve cleared up.  

A kiss can’t spread other sexually transmitted infections, such as HIV, the virus that causes AIDS, chlamydia, genital warts and gonorrhea. You can’t get pregnant from kissing, either.