It would be so fun to have a penis. The vagina isn't that nice of a shape, and because it's concave, masturbation isn't fun. Besides rubbing the clitoris, you can only put things inside yourself. The penis, on the other hand, can move around in all directions, and it looks damn fun. And waking up with an erect penis would be terribly funny. "Eh, it's standing again, oh well, time to get it done". I don't have problem with vagina. I'm not trans. But periods, period-related back pain, blood, and accidentally putting soap in there, which hurts a lot, is unpleasant and not fun. Not to mention the possibility of pregnancy, which is a terrifying prospect. At least tampons are bullet-shaped.