Passionate kisses are good for your oral health
As many as 80 million bacteria are transferred during a 10-second kiss, according to research published in Microbiome. As long as your partner has good oral health, this means you’ll get their good germs to boost your own. (Although it also works in the other direction so be careful!) In addition, swapping spit causes more saliva to flow and saliva washes away bacteria and debris which in turn lessens your risk of tooth decay, according to the Mayo Clinic.
Kissing can reduce stress
There’s nothing like a good smooch after a long, stressful day. In addition to releasing a surge of the relaxing hormone oxytocin, kissing has also been linked to a decrease in the stress hormone cortisol, Dr. Fisher says. It can also boost levels of serotonin, which leads to feelings of calm and contentedness. Ever wonder why you lean to the right when you kiss? Yes, there’s a reason for that.
Kissing can lower blood pressure
You might have noticed that kissing gets your heart pumping—and that’s a good thing. Any aerobic activity that gets your heart rate up helps pump blood to your organs and reduce your blood pressure, Dr. Ross says. Plus, kissing lower levels of the stress hormone cortisol which can also help to lower blood pressure.