Heh, a German biker who lost his original one in an accident had another one added with plastic surgery and fathered a child with it, but then decided he didn't like it and had a third one put in its place; the doctors left the second one in place while they waited to see if the grafts were going to take. Unfortunately, when he showed his wife from his hospital bed, she went home and packed her bags.
Quoting from Ananova,
From his hospital bed he said: "I've got two penises but no wife, but I am hoping when I get rid of one of the penises I will get her back."
The gentleman (men? heh) apparently allowed a crew to film the operation and make a documentary of it named The Last Penis.
Then there is the story of the doctor named Wecker who discovered the corpse of a man in Bologna in 1609 who had two penises; this is the first of over eighty documented cases, according to "The Penis Page," on the naughtythings site.
And from the gnarly department, a baby born with three legs, two penises and no anus. Warning, the first hit is from Ogrish, which is not a site recommended for the squeamish. I didn't look, not really needing any new nightmare material. =8o
Hopefully this is within the guidelines for the site; I have tried to avoid puns on the rather obvious profanities, and stick with the facts in answer to the rather unusual request for information. Please let me know if I am creating a problem here; it's not my intent, and I'll edit as necessary to conform without argument.