The penis is a male organ with functions that include reproduction and urination. As with any body part, no two people have the same penis.
The penis has two main features. The body, or shaft, connects the penis to the abdomen. At the opposite end of the shaft is the glans, or head.
This article lists some common types of penises, categorized primarily by measurement, and provides some related information.
Medical Illustration by Diego Sabogal
Penises come in different lengths when flaccid or erect.
Estimates about average penis length can vary. For example, one 2014 study looked at the penis size of United States males. It found that the average erect length was around 5.6 inches.
However, another article suggests there are issues with many penis length studies, including the fact that participants self-report measurements.
These studies use self-reported data and are therefore subject to bias, which likely fuels the widespread belief that the average penis size is closer to 6 inches. In reality, the average is likely to be lower.
Penises also have different girths or circumferences.
A 2014 study into the penis size of U.S. males found that the average erect girth was around 4.8 inches.
However, as with penis length, a person should note that many penis girth studies use self-reported measurements, which are known to be fairly unreliable.
Some penises are completely straight when erect. However, many have a bend or curvature. There are three main types of curved penis. These include penises that:
curve upwards from its base
curve downwards from its base
curve to the left or right
Additionally, some people may have multiple kinds of curvature. For instance, some penises may curve to the left and upwards.
Penile curvatures are common and typically benign. They are rarely painful and do not usually make penetrative sex more difficult.
However, abnormal penile curvature can sometimes be a symptom of Peyronie’s disease. One review lists the following as possible symptoms:
a thickened area, or plaque, in the penile shaft
curvature of the penis during erection
pain in the penis
Scientists are not sure what causes Peyronie’s disease.
One common explanation is that the condition results from mild, recurring trauma to the penis. This can occur during intercourse or masturbation.
Peyronie’s disease can also be due to a rupture in the penis, known as a penile fracture. Genetic factors may also contribute to the development of this condition.
Anybody who suspects they may have Peyronie’s disease should seek medical advice. Sometimes, people with the condition who experience no other issues, such as pain, could still use their penis for sexual activity without needing medical treatment.
In some cases, doctors may recommend surgery to remove the plaque or reduce the curvature in the penis.