Anal intercourse – when one partner inserts their penis (or a finger or sex toy) into the other partner’s anus – is a highly risky activity for transmission of HIV (the virus that causes AIDS) as well as other sexually-transmitted infections (STIs).

Not necessarily. It is true that a man’s risk for erectile dysfunction (ED) increases as he gets older, but lots of older men still have rigid enough erections and satisfying sex.

Oral cancer affects areas of the mouth and throat, such as the lining of the mouth, the soft palate, the pharynx, tongue, and tonsils.

Some men with inguinal hernias do report sexual problems, although the situation might be temporary.

Fetishism is a type of paraphilia that occurs when a person is sexually aroused by an object or body part that is not usually considered sexually exciting. (The object itself is called a fetish.) Some of the most common fetishes include:

The term gender fluid (sometimes written as genderfluid or gender-fluid) describes a person who does not have a fixed gender identity. In other words, that person does not feel that they identify completely as male, female, or another gender. Their gender shifts on a continuum or spectrum.

In most cases, yes, giving and receiving oral sex is safe during pregnancy. However, pregnant women should be careful if they decide to have oral sex, as there are some risks.

Hypoactive sexual desire disorder (HSDD) is a chronic lack of sexual desire that causes personal distress.

Hypersexuality (sometimes referred to as sex addiction or compulsive sexual behavior disorder) is a controversial diagnosis, but its associated behaviors can be addressed.

Semen is a whitish fluid that contains seminal fluid and sperm. It is generally expelled from the penis when a man ejaculates. But men may experience semen leakage at other times, such as when they are urinating or sleeping.

Leaking semen isn’t always a problem, but there are times when it can signal a health problem that needs medical attention.

Having a veiny penis usually isn’t a cause for concern, but men should always contact their doctor if they are experiencing pain, swelling, or other alarming symptoms.

Genito-pelvic pain/penetration disorder (GPPPD) refers to significant pain and difficulty with penetrative vaginal sex that lasts for at least six months.

GPPPD is actually an umbrella term for two sexual pain disorders: dyspareunia (painful intercourse) and vaginismus (a situation in which the muscles in the vagina contract to the point that penetration is difficult, and sometimes impossible).