..........why don't they fit a couple with just a urinal?
Our Britannia 312 circa the "50's had a small cubicle rigged as a Gents Toilet, with just a urinal pot on the wall. In that era we flew charters for the Gov't. carrying immigrants from the West Indies, none of whom had never flown before of course.
One day a steward entered the flight deck and whispered to the Flt. Eng., who started to laugh and then wrote in the Tech. Log. for the benefit of the next maintenance engineers at the next stop, then showed me ... Gents Urinal used as Arsenal, please clean .... At the next station the engineers cleaned out the urinal and wrote ... " Rectumfied"