One 37-year-old British man (who goes by "Rob") was shocked when doctors told him he has fully-functional female reproductive organs. While Rob has normal male genitals, he also has a uterus, cervix, ovaries and Fallopian tubes.

A man who calls himself Diphallia Dude (he refuses to reveal his true identity) has two penises. He even wrote a book about it. This condition affects about 1 in 5.5 million men.

Hazel Jones had two sets of sex organs — two vaginas, two uteruses, four ovaries, etc.This condition is known as "uterus didelphys" and is exceedingly rare.

Hannah Kersey is a woman with two wombs who gave birth to triplets.

Annie Hawkins-Turner, who goes by the name Norma Stitz, holds the Guinness World Record for having the largest natural breasts.

A fetish model named Beshine has had over 10,000 cc's of saline added to her bust.

Charles Lennon had an erection that lasted a full decade after penile implant surgery to treat his impotence went wrong.

The Mayer-Rokitansky-Küster-Hauser syndrome, is a condition where a woman doesn't have a vagina. It can be life-threatening since menstruation still occurs, but the blood has nowhere to go.

Persistent Genital Arousal Syndrome (PGAS) is a rare disorder that makes sufferers sexually aroused (sometimes to the point of orgasm), without any feelings of sexual desire. Zara Richardson may have the worst case of PGAS ever documented and has been known to orgasm up to 500 times a day.

Wesley Warren Jr. brought attention to himself trying to raise the $1 million necessary for surgery to have his 160 pound scrotum removed. In April 2013, a doctor offered to perform the surgery free of charge.