Two zeros: one sign
‘00‘ was used in Germany to indicate a public toilet.
‘00‘ do not refer to toilet seats or a butt!
How did ’00’ come to mean restroom?
A leftover from medieval ages…
In medieval ages the hotels didn’t have toilets in each room. They used to have only one bathroom on each floor. The room numbering started with the 1 so they needed another number/sign, so they took the ‘0’ or the ‘00‘.