Supernumerary penises (or, Pseudopapa)

This is a bit of an old story, but just because of Coward's recent foot-nipple post, and because our good friend Ben didn't think it could be topped, here's one about a Russian man who grew a penis on his arm.
The man was born with a penis so small that he was unable to have sex and had his teeny weenie removed and grafted to his arm where it was enlarged using flesh from his inner arm before being reattached to his groin.