Nature sometimes makes huge mistakes, snakes with 2 heads, white tigers, shark with 2 dorsal fins, just some examples. So yes, mistakes are also made with humans. Take this person, with clothes its a man but naked its a woman. Well almost, she is missing titties but has a pussy and clitoris. The correct term for this weird thing is intersex. Btw, there is some guy-stuff in this video, just to let you know...