I answered "Only in an emergency," since I'm the one who has to dump the cassette toilet tank. Damn, I'm seeing Robin Williams in RV. That being said, when growing up my grandparents in TN didn't have a bathroom until I was 12, so I'm no stranger to an outhouse. I also worked with the Scouts for years and the troop had their own toilet seat because the facilities at some camps were not well kept. AND I served 20 years in the Navy, and pooping in some shipboard heads was not for the weak of stomach. BTW, even with the bathroom built, Grandma continued to use a chamber pot at night.