Kissing Is Cardio: The Surprisingly Real Health Benefits of Making Out
Your doctor probably won't prescribe it, but the science says they should.
Your Brain on a Kiss
When you kiss someone, your brain releases a cocktail of dopamine, oxytocin, and serotonin — the same chemicals responsible for motivation, bonding, and the general sense that life is good and nothing on your to-do list matters. It's essentially a pharmacological event disguised as a romantic one. Researchers at Lafayette College found that kissing reduces cortisol, the stress hormone, which means a good makeout session is technically more effective than most things people do to 'unwind.' You don't need a meditation app. You need an overlook and a willing participant.
Calories Burned (Yes, Really)
A passionate kiss burns somewhere between 2 and 26 calories per minute, depending on intensity and how much physics you're involving. That's not going to replace your gym membership, but it does mean a thirty-minute session at an overlook is roughly equivalent to a brisk walk — except significantly more interesting and with a much better view. Some researchers have clocked vigorous kissing at up to 90 calories per hour. That's a whole granola bar's worth of effort, and you didn't have to put on running shoes.
The Immune System Boost
A 2014 study in the journal Microbiome found that a single ten-second kiss transfers approximately 80 million bacteria between partners. Before you make a face — this is actually good for you. Exposure to your partner's microbiome diversifies your own, which strengthens your immune system over time. Couples who kiss frequently get sick less often. Your body is essentially crowd-sourcing its defense strategy through sustained romantic contact. Evolution really thought of everything.
Blood Pressure and Your Heart
Kissing dilates blood vessels and increases blood flow, which lowers your blood pressure. Dr. Andrea Demirjian, author of Kissing: Everything You Ever Wanted to Know about One of Life's Sweetest Pleasures, notes that kissing literally makes your heart beat faster in a way that's good for cardiovascular health. Your heart rate goes up, your blood vessels relax, and your blood pressure drops. It's the only activity where an elevated heart rate and lower blood pressure happen simultaneously. Cardiologists call this a paradox. We call it a Tuesday night at Point Dume.
Pain Relief (Not Kidding)
The endorphins released during kissing can be more powerful than morphine — at least according to the research. Dr. Demirjian points out that the vasodilation effect also helps relieve headaches and menstrual cramps. Which means 'not tonight, I have a headache' is technically an argument for kissing, not against it. Science said it, not us. The next time someone reaches for the ibuprofen, you are medically permitted to suggest an alternative treatment plan. Whether they accept is between the two of you.
The Dental Angle
Kissing increases saliva production, which helps wash away bacteria on your teeth and neutralize the acids that cause cavities. The American Dental Association hasn't officially endorsed making out as a dental hygiene practice, but the science is there. Increased saliva flow means better enamel protection, reduced plaque buildup, and fewer cavities over time. This is the only health benefit on this list that your dentist would find professionally uncomfortable to discuss, which makes it the most fun to bring up at your next cleaning.
Anxiety and the Oxytocin Effect
Oxytocin — the 'bonding hormone' — floods your system during prolonged kissing. This reduces anxiety, increases feelings of trust and attachment, and generally makes the world feel like a safer, warmer, less terrifying place. Studies show that couples who kiss more frequently report higher relationship satisfaction and lower levels of perceived stress. In other words, the thing you're doing at the overlook isn't just fun — it's actively reinforcing the structural integrity of your relationship at a molecular level. You're not making out. You're investing in infrastructure.
Random Facts That Deserve to Exist
The longest recorded kiss lasted 58 hours, 35 minutes, and 58 seconds — set in Thailand in 2013 by a couple who presumably had nowhere else to be and the jaw strength of Greek gods. The average person spends roughly two weeks of their entire life kissing, which feels simultaneously like a lot and not nearly enough. Two-thirds of people tilt their head to the right when they kiss, a preference that appears to be hardwired from birth. The orbicularis oris — the muscle you use to pucker — is the only muscle in the human body that's attached to other muscles rather than bone. Kissing uses 146 muscles, including 34 facial muscles and 112 postural muscles. And the scientific term for the study of kissing is 'philematology,' which sounds like something that should require a PhD but really just requires another person and a spot where the world pauses.