Monogamy is sometimes confused with a complete guard against STDs, yet the situation is more complicated. People get into committed relationships without having been previously tested, not realizing they carry infections such as chlamydia or HPV, which can be symptomless for years. Certain STDs have lengthy periods of dormancy, and it becomes hard to pinpoint when or where they were acquired. Additionally, non-sexual transmission through shared hygiene products or medical procedures, along with the risk of infidelity, further muddies the risks. This is highlighted by studies, as surveys have shown that many monogamous people are still unaware of their infections. The only way to ensure sexual health, even in monogamous relationships, is by engaging in regular STD testing.
12 March 2025
9 min read
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Monogamy does not completely prevent the risks for STDs. True sexual partners are fewer with fewer partners. There are many reasons why STDs are present within exclusive sex arrangements:
Pre-existing Infections – Most adults start out in monogamous affairs without ever being tested. A person who unknowingly has an STD can pass it on to the other person—despite their faithfulness.
Asymptomatic carriers – Some STD's are asymptomatic and do not produce symptoms for many years, causing a person to believe he is disease-free but actually is not.
Long periods of dormancy – Certain diseases, including HIV and herpes, may remain dormant for many years, making it difficult to identify the time and place where and how the infection was acquired.
Non-Sexual Transmission – Sex is not required for all STDs to infect. STDs can be passed through shared hygiene products, medical procedures, and even birth.
Dishonesty & Infidelity – While most couples are faithful, infidelity exists and a single act can introduce an infection into a relationship where the partners are supposed to remain alone.
Studies on STD's Among Monogamous Partners
One study published within the Journal of Infectious Diseases found nearly half the population with chlamydia who were in a monogamous relationship were not aware they were contaminated. The CDC also conducted a study where it was found 80% of the population with HPV were not symptomatic but could pass the virus to others.
A fact is evident here: with the most common type of relationship—monogamy—testing is the only method for absolute certainty regarding one's status for STD's.
Asymptomatic STDs - The Silent Spreaders
One of the greatest difficulties with STD prevention is that many diseases are symptomless. This implies that even individuals involved in long-term, committed relationships might be unaware that they are carrying and passing on STDs.
Common Asymptomatic STDs
Chlamydia - 70% percent of the women and 50 percent of the men with chlamydia are asymptomatic. It causes infertility if left untreated.
HPV (Human Papillomavirus) – The majority of the HPV do not exhibit symptoms but are capable of causing genital warts or cancer of the cervix after a long time.
Herpes (HSV-1 & HSV-2) – Some people who have herpes have no breakouts but are contagious and can pass the virus to their partner.
HIV – It may stay hidden within the body for many years without symptoms appearing, thus testing is essential.
Trichomoniasis – Over 70 percent of the people who are infected with trichomoniasis are asymptomatic, but it does make you more vulnerable to other STDs.
Just because a person feels fine does not make them STD-free.
Most are tested after becoming ill with symptoms and therefore the diseases persist for many years.
You can never know for certain unless you are tested periodically—yes, even with monogamy.
A study published in the Sexually Transmitted Diseases Journal found that over 60% of the new chlamydial infections acquired by couples with monogamous relationships were the result of a current infection prior to their entering into the relationship.
This is because regardless of the loyalty of the two partners, either one or both might have a previously undiagnosed infection from a previous relationship.
Non-Sexual Transmission - How STDs Spread Besides Sex
Most people think STDs are spread through sex alone, but the reality is not exactly the same. There are STDs spread through mechanisms people are not aware of, so monogamy cannot be as good a protection as most people think. Unusual Forms of STD Transmission
Oral-genital contact
Oral sex may spread herpes, syphilis, and gonorrhea within a monogamous relationship. Kissing may also spread the cold sore virus HSV-1, and this would lead to genital herpes after becoming transmitted through oral sex.
Sharing Razors or Toothbrushes
Some blood-borne diseases like Hepatitis B and C are spread through sharing personal items.
Tattoo and piercing equipment
Can spread HIV and hepatitis and other diseases unless sterilised.
Childbirth and breastfeeding
Some STD's like HIV and syphilis are transferred from mother to child during birth or through breastfeeding.
Myths & Misconceptions
A study by the Journal of Adolescent Health found 40% of young adults believe STDs are spread through only vaginal sex. The false sense of protection results in placing couples at higher risk for becoming infected when believing they are "safe" just because they are faithful.
Monogamy cannot protect you against these risks—though education and awareness and regular testing can.
Infidelity & Risky Sexual Behavior
Despite the fact that most people completely trust their partners, studies have shown us that infidelity happens more than people think—and one act of infidelity can introduce an STD into a monogamous relationship.
Statistics regarding Infidelity
A study carried out by the Institute for Family Studies found 16% of couples who were married admitted to cheating at least once.
Another study by the Kinsey Institute further found that infidelity was the leading cause for the unintended spread of STD's within long-term relationships.
Why It Matters
Even in healthy and trusting relationships, affairs do occur. Too many individuals are not practicing protection during affairs, which is resulting in an increased risk of the transmission of STDs.
On the contrary, testing reduces uncertainty. When the two parties opt for regular STD testing, it reduces uncertainty and blame and makes the two safer no matter the recent or past encounter.
With all the risks associated with it, the only safe route with a monogamous relationship is through regular STD testing.
All sexually active people, both married and unmarried, are recommended to undergo testing every year.
Home STD testing is convenient and confidential, and it makes taking control of sexual health easier than ever.
Even within faithful, committed relationships, testing provides peace of mind and reinforces trust.
FAQs
1. Do we need STD testing anymore since my partner and I are actually monogamous?
Yes. There are certain STDs which are asymptomatic and may not be evident for many years. Perhaps the STD was acquired by either or both partners prior to entering the current relationship. Regular testing protects against either partner unknowingly transmitting the disease.
2. Monogamous couples should be tested for STDs how often?
The CDC recommends a yearly test for sexually active adults who are engaged in a monogamous relationship. Testing would need to happen sooner if there were a new risk factor (e.g., new sex partner with a positive status, medical procedures with blood exposure, or issues with infidelity).
3. Can I get many years after I got the disease?
Yes. Certain STDs like HPV, herpes, and HIV may be latent for many years with no symptoms. It may be that the person might have acquired the STD prior to his or her current partner and not realized it until many years later.
4. Which are the common asymptomatic STDs?
Some STDs are not immediately apparent but are nevertheless contagious:
Chlamydia (most don't know they have it)
HPV (some are carcinogenic and others produce genital warts)
Herpes (HSV-1 & HSV-2) (may be transmitted without
AIDS (may remain symptom-free for many years)
Trichomoniasis (70% asymptomatic in most instances)
5. Can an STD be acquired through non-sexual contact?
Yes. Some STDs are spread through sharing personal items, oral-genital contact, birth, and medical procedures where sanitization is not proper. Hepatitis B, herpes, and HPV spread through contact with the skin or contact with contaminated objects.
6. Does cheating always lead to the spread of an STD?
Not exactly, but it does increase the risk considerably. Research further shows that people who are unfaithful are not likely to practice protection and therefore increase the risk of acquiring and transmitting diseases. Once infidelity has occurred, it is essential to get tested.
7. Can someone get an STD through kissing?
Yes. Herpes simplex virus type 1 (HSV-1) may also be spread through kissing. Syphilis may also be spread through open mouth lesions.
8. The most effective protection against STD for monogamous couples is?
Get tested before entering into a relationship and get tested regularly.
Be honest with your partner regarding sexual history.
Realize the STD's are typically asymptomatic and that safety does not automatically follow from monogamy.
Use protection when oral and penetrative sex are practiced with partners whose sexual histories are unknown.
9. Are home STD testing kits reliable?
Yes. Home STD testing kits are highly reliable when used properly. They test for the same illnesses as clinics and are a discreet and easy means for people who would like to be tested in the comfort and privacy of their home.
10. What happens if my partner does not want to get tested?
If your partner protests, I would say testing isn't about trust—it's about your health. STDs aren't caused by infidelity and may happen with a loyal partner. Testing your partner can actually build trust and confidence within the relationship. If still resistant, test yourself and just have a very open discussion with them about the reasons why it's needed.
Take Steps to Protect Your Health!
Monogamy decreases the possibility of STD spread but does not eliminate the risk. It's a false assumption that exclusive sex guarantees absolute protection.
STDs are also spread through non-sexual contact such as oral contact and sharing of personal items. Infidelity does happen, and one single unprotected encounter is enough to pass an infection. At-home STD testing is a quick, confidential, and reliable way to check your sexual health.
Seize Control Over Your Well-being Now Just because you are in a monogamous relationship does not mean you won't need regular STD screening. Don't make assumptions—get tested. Acting proactively safeguards your health and your partner's health so that trust and health can unite.
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