If a dude's gotta go, then he's gotta go, so he'll need his dick back.
I've got admit, that I know nothing about the practicalities of being trans. Can pre-op trans guys piss at a stall? Like how do they aim? Apparently they can, and all the power to them, but how do they get it that far? I'm not saying that my dick extends a meter, but if I point it forward that's where the stream goes... Most of the time anyway. But can a person with female genitalia really get it to go that much forward?