I remember seeing photos years ago (no link, sorry, and even if I had one, it wouldn’t be safe for work) of a…person…called the Boston Batwanger that was supposedly a true hermaprhodite. Does anyone have information on that (safe for work info, preferably)?
I would think, answering the OP’s question and staying on topic, it wouldn’t be much of an advantage, evolutionarily speaking, for a person to impregnate themselves. Talk about a shallow gene pool!