Erectile dysfunction (also known as ED or "(male) impotence") is a sexual dysfunction characterized by the inability to develop and/or maintain an erection. [22] [23] The study of erectile dysfunction within medicine is known as andrology, a sub-field within urology. [24] Ruth Bell, Changing Bodies, Changing Lives: Expanded Third Edition: A Book for Teens on Sex and Relationships, ISBN 0307794067, p. 15 Carcinoma of the penis is rare with a reported rate of 1 person in 100,000 in developed countries. Some sources state that circumcision can protect against this disease, but this notion remains controversial among medical circles. [58] Many people around the world have their foreskin surgically removed, in a process known as male circumcision. Marv Rubinstein, American English Compendium: A Portable Guide to the Idiosyncrasies, Subtleties, Technical Lingo, and Nooks and Crannies of American English, ISBN 1442232838, p. 147

a b Alan Glasper, Edward; Richardson, James; Randall, Duncan (2021). "Promote, Restore, and Stabilise Health Status in Children". A Textbook of Children's and Young People's Nursing. Elsevier Health Sciences. p.382. ISBN 9780702065033. Richard E. Jones; Kristin H. Lopez (28 September 2013). Human Reproductive Biology. Academic Press. ISBN 978-0-12-382185-0. Janell L. Carroll (29 January 2009). Sexuality Now: Embracing Diversity: Embracing Diversity. Cengage Learning. p.149. ISBN 978-0-495-60274-3. Moore, Keith; Anne Agur (2007). Essential Clinical Anatomy, Third Edition. Lippincott Williams & Wilkins. p.265. ISBN 978-0-7817-6274-8.Testicles: The small organs inside your scrotum mostly exist to make sperm. As your testosterone levels fall, sperm production slows and they shrink.

Though the size of a penis varies considerably between males, the average length of an erect human penis is 13.12cm (5.17 inches), while the average circumference of an erect human penis is 11.66cm (4.59 inches). [20] Direction Root of the penis (radix): It is the attached part, consisting of the bulb of penis in the middle and the crus of penis, one on either side of the bulb. It lies within the superficial perineal pouch. The crus of penis is attached to the pubic arch. In Peyronie's disease, anomalous scar tissue grows in the soft tissue of the penis, causing curvature. Severe cases can be improved by surgical correction. If you have ever been concerned about your penis size, you're not alone. The size of the male sex organ has long been thought to be an indicator of a person's testosterone levels and sexual abilities. But this is a myth. International Journal of Andrology: “Critical androgen-sensitive periods of rat penis and clitoris development."

Is my penis normal?

Lube prevents too much friction, which causes condoms to break and irritates and tears the skin of the penis, vagina, or anus, opening you and your partner(s) up to infections. Get to know your penis In addition, males can—and do—adjust their ejaculates in response to sperm competition and according to the likely cost-benefits of mating with a particular female. [45] Research has focused primarily on two fundamental ways in which males go about achieving this: adjusting ejaculate size and adjusting ejaculate quality. The key to making the most of the curve is flipping your partner(s) around to get you closer to those pleasure spots. Kilgallon, Sarah J.; Simmons, Leigh W. (2005-09-22). "Image content influences men's semen quality". Biology Letters. 1 (3): 253–255. doi: 10.1098/rsbl.2005.0324. ISSN 1744-9561. PMC 1617155. PMID 17148180.