why is it called a restroom sign —

Founded why is it called a restroom sign models & stl files for printing
Dice Tray
TreeTolber
golden shit
Marco
Owl Jar
Knightrider
A Lithophane
BobinAtlanta
A French Face Shield
Philippe BAUER
Stonehenge
cncMaker1976
Negoyle
Gasol1n
Simple Heart
slagovskiy