When I think of it, I think of Ranma (anime) and a show called Kashi Mashi Girl Meets Girl (also an anime).
Ok admit it, if a bucket of water in the face made you fully and biologically the other half, you WOULD abuse the option

I would, you would they would we all would.
Why pay for your drink if some horny male will do it for you.
Why have to kneel in front of the boss to get a raise, if you can switch genders and be all manly about demanding you get the spot instead of the other guy.
I watched the second show I mentioned, and I admit, it was a revealing experience looking at the show. Guy dies in accident, and is recreated by the aliens that accidentally killed him, but they screw up and make him female right down to the cellular level by mistake. It is not reversible too. If that happened to me tomorrow, well no, I would not be able to just walk into a female lifestyle just because I am female on the inside.
I have never put breasts into a bra. In the show, it was funny watching a girlfriend of the guy needing to explain how to do it to her.
She had to be taught how to be female.
I walk unlike a female. But I don't know any other way to walk.
I am sure I look male when I am walking, but I look carefully at others walking and it is often hard to see what is different.
And yet, you can tell the girl from the guy if two people are walking in front of you and dressed in a non gender specific outfit.
Just too many little details too hard to really define. But it takes YEARS of conditioning to make little girls into young women.