I don't know where this idea of "holding up your pants" came from. You aren't pulling your pants down to your upper thighs or anything of the sort. You merely pull the very front of your pants down, however far you need to get your junk out and about, and let it rip. I have never, not once, in my 21-odd years of peeing for myself, had an issue with my pants falling down or losing control of anything.