It would be nice if you could just choose whether you were male or female. Troonsitioning doesn't really work.
Even though it makes dating a nightmare, I like being a man. Having a dick and balls is nice and I am glad I am not the one that has to give birth.
There's an episode of Lloyd in Space like that, an alien kid that can choose at puberty. The whole episode the boys and girls try to get him to choose the team it's funny