Forget sex. Kissing can be one of the most intimate, sensual, and just plain fun things you can do with another person. And as anyone who is sex-educated knows: the better the foreplay, the better the sex. Read on to discover ten unusual kissing facts, and be grateful that locking lips no longer leads you to the guillotine.

1. According to anthropologists, 90 percent of people kiss. But that doesn’t mean that kissing is the same for everyone. Kissing customs vary across the world.

3. Let's talk science. Kissing generally uses one muscle, called the orbicularis oris, that is responsible for puckering your lips when you kiss. The science of kissing itself is called philematology.

4. Making out can be healthy for you. Kissing for one minute burns 26 calories. So enjoy that chocolate cake, and make up for it later with an extended make-out sesh with your partner.

5. The world record for longest kiss goes to Americans Rich Langley and Louisa Almedovar for a session lasting 30 hours and 59 minutes. No word on if they got food and bathroom breaks.

6. On average, two-thirds of people tip their heads to the right when they pucker up.

7. Some believe this tendency starts in the womb before you are even born. Or maybe you're just getting over the trauma that was your first kiss (you know, when you collided your nose into his and ended up kissing his ear instead of his mouth.). 

8. Kissing can increase your life expectancy.

9. Sucking face has been blamed for the rise of Mononucleosis. Also, the spread of cold sores, and the general transmission of other unsavory diseases. (Sorry, this is a less-than-fun fact.)

10. But a study has shown that men live up to five years longer if they kiss their wife before going to work. So gentlemen, pucker up — for health's sake.