One imprtant difference between the male and female genital area is that males have two openings, one for passing urine and semen through the tip of the penis, and the anus located behind the scrotum. The most obvious feature of the male external genitalia is the penis. The shaft is made up of three cylinders which swell with blood when the penis is sexually stimulated causing it to enlarge and harden.
Some men have penises that are longer and while others have penises that shorter.
I'm really concerned that my penis is too small. Many males are convinced that their penis is smaller than it should be. Because this is such an important issue for many men, one would expect that scientists would have done a great deal of research on penis size, but surprisingly this is not the case. What few data are available are based on small numbers of men or involved having volunteers measure their own penises at home, without the direct supervision of scientists. The possibility exists that men with smaller penises did not volunteer, that measurements were not according to instructions, or that some men simply rounded up to the next highest number when they reported the measurement back to the scientists.