By definition, sexually transmitted infections (STIs) are transmitted from one individual to another by doing the deed. If you’re in a monogamous relationship and your partner contracts an STI like trichomoniasis out of nowhere, you might start ringing the cheating alarms 🚨.

So before you go dumping their prized possessions on the front lawn, here are the deets.

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Trichomoniasis is an STI caused by a parasite. No, not the 2020 Best Picture Oscar winner, “Parasite.” We’re talking the kind of parasite that needs to live off hosts to survive.

Trichomoniasis (sometimes called trich for short) is one of the most common and curable STIs. According to the Centers for Disease Control and Prevention (CDC), about 3.7 million people in the United States contract trich.

Although both men and women can contract trichomoniasis, it’s more common among women. A research review showed that 40 to 49-year-old women are more likely to contract the infection than their younger counterparts. Trichomoniasis also affects men and women differently.

After you’ve contracted trich, symptoms can start to show their ugly faces anywhere between 5 and 28 days.

If you’re looking for a symptom of trich, keep in mind that according to the CDC, only 30 percent of people who contract the infection ever show any symptoms.

The parasite that causes trichomoniasis (aka Trichomonas vaginalis) thrives in semen and vaginal fluid. This means that trichomoniasis can be transmitted through sex without a barrier method, vaginal, anal, or oral sex.

Trichomoniasis is commonly transmitted between a person with a penis and a person with a vagina or between two people with vaginas. And ejaculation doesn’t have to happen to transmit that parasite, so pulling out won’t save you.

Trichomoniasis can also be transmitted by sharing sex toys, so clean those dildos after every use.

For people with penises, the parasite typically causes an infection in the urethra. For people with vaginas, the infection can live in the vagina, vulva, cervix, or urethra.

If you are in monogamous bliss and your partner tests positive for trichomoniasis, your mind may justifiably jump to infidelity.

Sex is the most common way to contract trichomoniasis, but it’s a bit more complicated than one day your partner cheated and the next day, they had trich symptoms.

If only 30 percent of people with trichomoniasis have symptoms, that means that 70 percent of folks with trichomoniasis have no symptoms. This means it’s possible that your partner acquired trichomoniasis from a previous sexual encounter and only recently started showing symptoms.

The parasite can cause someone to experience the infection for months while they show zero symptoms.

If you or your partner start experiencing trich symptoms, you both need to get tested for STIs. The CDC offers a free tool that helps you locate STI testing near you.

There’s nothing to be ashamed of when it comes to STI testing. In fact, it’s the only way to know for sure that you’ve contracted trichomoniasis (or any other STI) or not.

If you’re getting tested for trichomoniasis, it’s a good idea to also get tested for chlamydia or gonorrhea. Trichomoniasis can increase your chances of getting another STI, so it’s best to check if trich brought any +1’s to the STI party.

When you test positive for trichomoniasis, it’s important to follow up with treatment especially since trich increases your risk of getting other STIs.

Trichomoniasis can be treated with antibiotics. These most commonly include, metronidazole (Flagyl) and tinidazole (Tindamax). It’s advised to finish your entire antibiotic prescription even if symptoms disappear. Make sure you wait at least a week before getting busy.