@engineer,
The bathroom issue is a riot.
People who go on African safaris don't have the luxury of bathrooms. The men use the front of the vehicle, and the women the back.
In some Asian countries, both men and women use the same bathroom. In Japan, men and women use the same bath.
When growing up in the J-town of Sacramento, we used to go to the public bath where men and women used the same bath. We didn't have a bathroom in our three room apartment, but we did have a toilet on the porch in the back that we shared with other tenants of the building.
When we were in concentration camp during WWII, we had communal showers and bathrooms.