Do they have such kick a$$ toilets, that they need to be seen when not in use?
If you want to go further in your home, you can buy high end models which will give you a urinalysis or even a fecal one to monitor your health.
When I first went there in 1977, lots of people were still using the basic outhouse with a night soil scoop or an indoor model that needed to be pumped out periodically.
It is amazing how far they've come. Meanwhile, our toilets have changed very little since I was born in the 1950s save for the fact that they don't flush as well.