Men's sexual penis it is possible to compare to an axis round which all representations of the man about themselves rotate. In it - centre of its machismo, a source of the deepest experiences. Nevertheless many men have no the slightest representation about anatomy and penis physiology. Absence of such knowledge often is an alarm and anxiety source.
Stages of development of genitals

At an initial stage of development the sexual penis looks as an open niche. Its bottom edges form a fillet, then they are closed and grow together already at an early stage of development. Traces of this fillet remain on the bottom surface of a sexual penis in the form of a seam lasting further along a body. The seam can be swept well up or, on the contrary, is not visible almost. It does not influence health in any way.

Seam

Sometimes the man notices this seam only at mature age. Quite often such opening becomes the anxiety reason, some men even address to the doctor. There is nothing to be afraid here - everything is all right.

The penis consists of a long body and the head located on its end. Its root leaves deeply in back area. The length of a root is equal to half of length of the penis. The root is similar to an anchor: it keeps made heavier during time erection a penis. Insignificant movement of a penis, however their main function are capable to cause muscles surrounding a root - to carry out seed emission.

The skin covering a penis is deprived hair and reminds a skin of eyelids: it as is elastic, mobile and possesses ability to move over the fabrics located under it. During time erection it is stretched according to the increasing sizes of a penis.

Bulbs in a skin penis

With the years on a skin of a body of a penis there are appreciable hair sacks, and further and a small amount of hair. Sometimes hair sacks with the increased sebaceous glands are perceived men's as "spots".

Contrary to the standard opinion the penis body does not possess the big sensitivity. Quantity of the nervous terminations on its skin at all more than on other parts of a body. Sensitivity of a penis almost same as vaginas, and even it is slightly less.