#1 is kinda gross..

Benefit #1: Your pearly whites stay cleaner Though   it’s certainly no replacement for brushing your teeth, kissing can break down   oral plaque and prevent cavities by stimulating the creation of saliva, which   helps wash bacteria away from the tooth’s surface

Benefit #2: Keep a younger-looking face as you   age Speaking of saving money, you can say good-bye to Botox and acid peels (or   at least cut down on those pricey anti-aging treatments). Ever notice how happy,   loving couples still retain an air of youth, even as they grow older? The answer   could be down to frequent kissing.

Benefit #3: A revved-up metabolism In addition   to providing a facial workout, kissing can also help you lose inches from your   waistline, too. As you lean in for the kiss, you may feel as though your heart’s   racing. It’s not just your imagination; it is beating faster. As the heart beats   faster, it releases adrenaline and other neurotransmitters in the blood. The   boost in adrenaline increases your metabolism and helps burn extra calories,

Benefit #4: Your immune system gets a healthy   boost Just like working out, kissing can boost your immunity. So if you’re a   germophobe, listen up: Swapping spit means swapping germs, and that is nature’s   natural form of vaccination.

Benefit #5: Improved mood and decreased stress   levels overall Ever notice how you feel after a good make-out session? It’s   like you’re floating on cloud nine, all your cares melt away, and you feel like   you could do anything. That’s because kissing releases nature’s antidepressant.