Let me try this without offending anyone...
One of the great challenges of train travel, at least for us guys, is standing up trying to use a toilet while the train is rolling/bouncing/swaying. But you get used to it, and your "aim" improves with practice.
Problem is, when you get to a destination or return home, if you've been riding trains for several days, you still get the same sensation of trying to keep your balance while attempting #1. But again, you get used to it.
Um, YMMV.
Yeah, I know, we could sit down too but that just doesn't seem natural.