a delicate question...

[liars-dance.livejournal.com]

... to you good people of the US. Would a fifty year old man (mentioning no names *g*) say 'I need to go to the bathroom'? Or would he say something like 'I need to take a leak - have a piss' or something like that? I know all sorts of UK alternatives but not American. Any help gratefully received :)