Here's something not everyone thinks about nowadays. I've been doing some research into indoor plumbing. Until recently the Census Bureau asked a lot of questions about the number of toilets people have--and folks really hated it. The reason why is an amazing number of homes did not have indoor bathrooms until well into the 20th century--especially in farm/rural areas. I was working on a story set in 1880 in Denver. There's a good chance a home would not have had any indoor plumbing at that point in time. Packaged toilet paper went on the market in 1857. I guess people used corn cobs before then.
Privy is a synonym for outhouse. Nowadays I suspect most folks are unfamiliar with the term.