probably 2 dicks are possible as some type of "birth defect" - possiby a malformed twin - people have been born w/ 3 legs, for example. Late 19th-early 20th "freak shows" at the circus "side-show" had all sorts of oddly shaped people, who in those days had little opportunity to earn a living out side of the circus. So, if a person could have 3 legs, I suppose a guy could have 2 dicks - but even in the side-shows of the time, I doubt he'd be allowed to display his "special feature" - but who knows ? This might be a topic for a google search. Today, I'd say, most examples are probably photoshopped fakes.

I have enough to deal with having one penis.....can't imagine trying to satisfy two!

There is a commercial paysite on the net, I'm not sure what's the name - don't remember, it shows men with 2 dicks, girls with more than 2 tits, and other kind of freaks. It all fake, indeed, but well done

snakes have double dicks .. so I suppose a man with 2 snakes is feasible.