2. CHLAMYDIA

Chlamydia, another bacterial infection, is spread through unprotected vaginal, oral, or an*l s*x.

As with gonorrhea, condoms are nearly 100 percent effective at preventing the spread. And if you’re giving oral s*x to a woman, dental dams can reduce your risk.

Signs of chlamydia: Chlamydia rarely has noticeable symptoms in either women or men, says Herbenick.

In the off-chance you do show signs of infection, the symptoms could include a penile discharge or burning when you pee, says Dr. Ghanem. These problems usually creep up about a week after an exposure.

Severe infections in men that are not treated quickly can cause scarring in your urethra, making it more difficult to pee—and it may even require surgery.

How to detect chlamydia: The CDC recommends annual screening for gay or bisexual men. However, straight men should ask their doctors about testing as well.

How to treat chlamydia: Chlamydia can be cured with antibiotics.

3. HERPES

private part herpes is caused by two viruses: Herpes simplex type 1 (HSV1), which usually affects your mouth as cold sores, and herpes simplex type 2 (HSV2), which mainly targets your private parts.

s*xual contact can spread your partner’s oral herpes to your private parts or her private part herpes to your mouth. The virus can be spread even if you—or your partner—don’t have any signs of it.

Wearing condoms can help protect you, but not completely: They’re only 80 percent effective for preventing herpes transmission, says Dr. Ghanem. That’s partly because the virus can live on parts of your skin that aren’t covered by the condom.

Signs of herpes: Up to 70 percent of people infected with the virus don’t have symptoms.

If you do, you may notice blisters or ulcers on your private parts, or just feel some burning and itching.

When first infected, some patients will develop fevers, chills, swollenlymph nodes, headaches, and fatigue.

How to detect herpes: Have your doctor take a look at any suspicious sores.

How to treat herpes: There’s no cure for private part herpes, but antiviral drugs can ease your symptoms, according to the CDC.