Articles Index

Drugs for Treatment of Premature Ejaculation

An explanation of drugs being investigated to treat premature ejaculation (PE).

Penis Goes Soft

If you or someone you are sleeping with is losing erections during sex, it may not mean what you think it means. Here are the most common reasons why a penis might go soft, and tips on what you can do about it.

Anus

Description of the anus and rectum, and the part they play in sexual anatomy and response.

Penis Anatomy

A plain language explanation of penis anatomy including the shaft, glans, frenulum, foreskin, and the internal anatomy of the penis.

Prostate Gland

Description of the prostate gland, which produces some of the seminal fluid and is a part of male sexual anatomy.

Male Genitalia 101

A guided tour of the basic parts of male genitalia including the penis, scrotum, prostate gland, frenulum, perineum, and anus.

Average Penis Size

What does scientific research have to say about average penis size? Penis size is measured in terms of both average length and girth of a flaccid penis and average length and girth of an erect penis. There are many problems with determining what the average penis size is.

Does Penis Size Matter?

Does penis size matter? Research on the importance of penis size to men and women.

Penis Size

Penis size may be the biggest source of worry for men. Learn the facts about average penis size, does penis size matter, the trouble with comparing penis size, and whether or not you can do anything to enlarge your penis.

Masters and Johnson's Description of Male Sexual Response

Description of the male sexual response cycle according to the research of Masters and Johnson. Includes a description of the excitement, plateau, orgasm, and resolution phases of male sexual response.

How Erections Work

How do erections work? A plain-language explanation of how erections happen.

Micropenis

Explains the causes, treatment, and problematic social meaning of a micropenis, which is a clinical term to describe a very small penis.

Increase Semen Volume

Is there a way to increase semen volume, and will having more semen make sex feel better?

Morning Erections

Morning erections, euphemistically called “morning wood” can be a source of confusion and occasionally embarrassment for younger guys, and concern for older men who may find their morning erections reduced or gone altogether.

Causes of Premature Ejaculation

We don’t know what causes premature ejaculation, but here are some of the theories about the cause of premature ejaculation.

Scrotum and Testicles

A description of the scrotum and testicles, part of the male reproductive and sexual anatomy.