My grandfather (HFS): You should consider renting a porta potty when you have all those people over every other week.
Mom, Nana, and me (in unison): Ewwwwwwwwwww!
HFS: No really, it’s a good idea.
Me: Well, we’d basically have to buy one, don’t you think?
HFS: No, just rent it! They’re not expensive.
Mom (AMS): Um, Dad… women don’t use those.
HFS: Sure they do!
AMS: No… I don’t use them.
Me: Neither do I.
AMS: I’d never use one. Kathy, would you use one?
Nana (MKS): No! Never!
HFS: Yes you would – you’ve used one!
MKS (aghast): I Have Not!
HFS: I’VE SEEN WOMEN COMING OUT OF THEM!
Me: Yeah, well… they weren’t using them, take my word for it.
HFS: <shakes head with resignation>
Trivia: according to wikipedia, “portable toilets are referred to colloquially or sold under such brands as port-a-john, job johnny, port-o-let, port-a-loo, sani-privy, port-a-san, porta-potty, tidy john, John To Go, Biff, toi-toi, J-Jon, P-Unit, and porta-kybo.”