Blowjob Science Is Clear: You Should Swallow
11 research-backed reasons that may surprise you

Spit or swallow? It’s a very personal preference.
Some men and women don’t like blowjobs at all. Some think it’s disgusting, gross, or downright demeaning. Others of us can’t get enough.
The good news? Each of us decides what we enjoy. And there isn’t anything wrong with changing your mind on different days or with different partners.
The existing science, however, offers a clear preference.
You should swallow.
The Science for Swallowing
I’m well aware that a man pitching the benefits of swallowing is a bit like a bartender talking up the health properties of alcohol. However, there is sound science behind blowjobs.
Particularly, the research on swallowing suggests several positive effects:
Mood enhancer
It turns out that semen may have natural mood-enhancing potential. According to an article on Healthline.com, exposure to semen might have properties related to endorphins, oxytocin, and serotonin.
All three of these chemicals help elevate your emotional and mental state.
They are responsible, at least in part, for your happiness, pleasure, and bonding with others. Oxytocin is known as the “love hormone” for its contribution to building trust, connection, and empathy with others.
Lower depression
A 2002 study at the State University of New York in Albany suggests that semen may serve as an antidepressant. According to the study, “These data are consistent with the possibility that semen may antagonize depressive symptoms.”
That’s right, ladies and gentlemen. Knocking back a mouthful of semen might replace antidepressant pills without all those nasty side effects. Of course, it’s always a good idea to check with a doctor before making any decisions regarding medications.
Natural sleep aid
Semen contains melatonin, a chemical known for its sleep-inducing prowess. That means swallowing your partner’s semen might help you:
- Nap
- Fall asleep faster
- Sleep longer
- Sleep deeper
- Feel more rested
Is anyone else getting tired?
Natural stress relief
For the same reasons semen is considered by some to make you happier, it also has shown signs of reducing your stress. The chemicals in semen might both boost your mood and relieve stress.
That gives a whole other meaning to stress balls! 😜
Increase ovulation
While this may not be a motivator for some women who are not looking to get pregnant, it can certainly be a benefit for those who want to have a child.
In his Psychology Today article, Attention, Ladies: Semen Is an Antidepressant, Michael Castleman explains:
Human women have concealed ovulation. Men don’t know when women are most fertile. Compared with men whose semen lacked ovulation-triggering hormones, those whose semen contain these hormones would gain a small reproductive advantage. Their semen would encourage ovulation, and their sperm would be more likely to fertilize eggs.
Immune system boost
According to a study published in the Journal of Reproductive Immunology, swallowing semen can get your body used to the person’s DNA. This, in turn, can help reduce immune system complications during pregnancy.
So, the next time your guy asks you to swallow, he may just be looking out for you and his future offspring — what a nice chap. Or, as is infinitely more likely, he may know nothing about this scientific evolutionary theory, and simply enjoy the thought of you swallowing.
Either way, science supports swallowing for healthy ovulation and pregnancies.
Prevent morning sickness
Yes, research suggests that sperm may cure your morning sickness. Gordon Gallup, a SUNY-Albany psychologist, says increased sperm exposure might build your body’s tolerance to a man’s DNA before and during the first month of pregnancy.
One caveat is that the sperm must be from the biological father of the baby.
Lower blood pressure
Regularly swallowing semen can lower your blood pressure. This might seem like something a guy would make up to get regular blowjobs, but it turns out the research was actually published in the American Journal of Obstetrics & Gynecology in 2003.
Reduce the risks of preeclampsia
Swallowing semen may decrease the likelihood that women develop preeclampsia, a sudden surge in blood pressure.
A Medical News Today article describes a study that compared the data from 118 women with preeclampsia to 106 women without the disorder. The findings? Women with higher exposure to semen showed a reduced risk for preeclampsia.
Preeclampsia, if untreated, can be fatal. Not all heroes wear capes — or underwear.
Reduce the risks of liver disease & liver cancer
Semen may prevent liver disease and liver cancer, according to a 2017 study out of Texas A&M University. Makes you kind of wonder what they are getting up to over there in Texas.
Longevity
Some research suggests that semen may increase your lifespan. Yes, really.
Researchers involved with the study shared their exciting findings:
“It’s a dramatic increase in lifespan of animal models, as much as 25 percent,” said Leyuan Liu, PhD, assistant professor at the Texas A&M Institute of Biosciences and Technology’s Center for Translational Cancer Research. “In human terms, that would mean that instead of living to about 81 years old, the average American could live to be over 100.”
Who knew the fountain of youth might exist right there between your partner’s legs?
What’s in Semen Anyway?
With all this talk of the miraculous benefits of swallowing, you may be wondering what exactly is in semen. Mostly, sperm and water.
Sperm, however, contains all kinds of chemicals, such as:
- Zinc
- Calcium
- Magnesium
- Citric acid
- Lactic acid
- Potassium
- Protein
- Fructose
- Sodium
- Chloride
- Urea
- Citrate
- Glucose
I don’t expect most people to know what all of these chemicals mean, so let me summarize. Sperm contains lots of chemicals, including sugar and salt. It has nutritional value, about five and twenty calories per serving (you read that right), and — according to anecdotal evidence — varies in taste based on each individual.
The taste, however, usually falls somewhere on the range of bitter, salty or sweet.
“Swallow. Swallow it all. Swallow every drop. Eat it like the precious honey it is.” — Callie Press, author of Give Good Head: How To Please Any Man
Is Semen Safe to Swallow?
For most people, semen is safe to swallow. Nothing naturally occurring in semen is harmful.
However, there are exceptions.
- Some people are allergic to semen. The fancy name for this is seminal plasma hypersensitivity.
- There is also the potential risk of contracting a sexually transmitted disease. Experts recommend practicing safe sex by using protection, being monogamous, and getting tested for sex-related diseases.
Final Thoughts
The science of swallowing is compelling. However, more research is needed to strengthen the findings and confirm the conclusions.
Until then, you may want to consider swallowing your partner’s semen anyway. Or, you know, don’t.
One of the greatest things about sex is the complete freedom to follow your personal preferences and desires. Either way, always remember that, like the quote below from Katee Sackhoff, blowjobs are supposed to be fun:
“When I was really young, I didn’t know what a blow job was and I assumed that it meant you blow on it. And I remember one time this older guy that I knew was trying to give me tips, he’s a gay guy and one of my really good friends, and he goes: ‘Make sure you always remember that the balls are not there for decoration.’ And I was like, ‘Well, what do you do with them? Do you box them?’”






