It’s possible that caffeine could help a man’s erections, but more research is needed.

Caffeine is a stimulant found in foods and beverages. Coffee, tea, soda, and energy drinks are common sources.

Past research has found that caffeine may have some health benefits, but its role in erections has been unclear.

A penile plethysmograph is a device used to measure blood flow to the penis. Because good blood flow to the penis is important for erections, penile plethysmography can be especially helpful for doctors evaluating a man’s erectile function.

When a man has a hidden or buried penis, the shaft of his penis is tucked inside the skin of his scrotum, abdomen, or thigh. The penis is still a normal size, but only the tip of it is visible. The condition is sometimes called an inconspicuous or concealed penis.

Yes, some women do reach orgasm before they wish to, although it is not very common.

The situation is similar to premature ejaculation in men, but has not been as widely studied.

Many men worry that the amount of semen they ejaculate reflects on their masculinity. Some feel that if they ejaculate more semen, they will feel greater sexual pleasure, too.

When a man reaches orgasm, he ejaculates fluid called semen. On average, men expel between 1.25 and 5.00 ml (1/4 of a teaspoon to 1 teaspoon) of semen each time they ejaculate. But this amount varies from man to man.

Congenital adrenal hyperplasia (CAH) refers to a group of congenital (present at birth) conditions caused by problems with the adrenal glands.

The term “intersex” is used to describe disorders of sex development (DSDs) – situations in which a fetus develops differently from a typical male or female.

Sex after miscarriage depends on the individual. A woman’s health care professional can give the best guidance on her personal situation.

Yes. Many men with thyroid problems have erectile dysfunction (ED).

Yes. In addition to other health benefits, regular exercise can help men with their erections.

Men with an enlarged prostate should not take medications that contain antihistamines or decongestants. These agents are often found in over-the-counter cold, sinus, and allergy medications.