The Erect Penis
Size, shape and angle in pictures
There is no such thing as an average penis: every variation of form and structure is represented in the male population. These pictures illustrate some of the variations in erections - all of which are "normal".
All pictures from Images of Size, a guide to the penis with hundreds of penis pictures.
Erection with penile shaft bending or leaning to left or right
Statistics reveal how often erect penises lean or bend to one side:
Erection with straight penile shaft
Erection with penis shaft bending up or down
Statistics show the following frequency of an erection curving up or down:
It's questionable at what point a bend becomes so great that it is no longer part of "normal" variation. Certainly the last 2 penises pictured seems to have a more acute bend that may be Peyronie's disease.
Erection leans or bends both up or down and to one side
Some penises do more than one of these things! About 2.5% bend left and curve up. About 7.4% bend left and look straight from the side. And about 3.7% bend left and curve down. And just a few bend to the right and curve up or down.
Angle of erect penile shaft varies from downwards to upright when man is standing or sitting
As a generality, the smaller the penis and the younger the man, the harder and more upright will be his erection. This may limit the number of sexual positions a man is able to enjoy; for example, the rear entry sexual position may not be practical if a man's erection stands hard up against his belly. The more upright the erection, the less flexible the base of the penis at the point where it enters the body cavity. Such flexibility can allow greater ease of movements during intercourse.
Imagine a man standing
upright with an erection. If his erection were vertically upright, that would
be 0 degrees from the vertical. If it were pointing straight out in front of
him, that would be 90 degrees from the vertical, and if it were hanging down
and pointing at the floor, that would be 180 degrees from the vertical. The statistics
for the whole population are:
Shaft of penis twists along its length on erection
A twist along the length of the shaft is less common than a simple bend or lean to one side on erection, but it is still common enough not to be considered abnormal. A twist in the shaft may also be associated with hypospadias.
Bends in shaft
Such bends are often the result of injury, frequently sustained during intercourse without the man being aware of it. Even very brief pain may indicate underlying damage that only manifest weeks or months later in penile bending or twisting as shown below. Such injuries may induce Peyronie's disease.
Twisting of head in relation to penis shaft
The twist of the shaft on erection is a common anomaly. Estimates suggest between 3 and 5% of men have some degree of twisting.
The twist illustrated below is associated with hypospadias, though such an anomaly may occur without hypospadias being present. In this penis, the raphe runs at an angle down the length of the penile shaft, representing the true midline of the shaft. The urethral meatus is apparently displaced to one side.
Other Penile Variations
Narrowing of the penile shaft as a result of injury
Such injuries usually occur when the penis is engaged in vigorous sex and rams head-on into some hard obstacle. The resulting bleeding in the erectile chambers of the penis causes scar formation; because this scar tissue cannot expand in the same way as the rest of the penile chamber, a constriction develops on erection.
An unusually prominent glans
Some men have a glans which is by far the widest part of their penis. You can see this in the picture below. There is no anatomical or medical significance to this, but such a prominent head can produce very satisfying feelings for a woman during intercourse.
Narrowing of the penile shaft around the base of the glans
This may be natural, or it may be the result of injury. It often occurs in cases of hypospadias.
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