why is it called a restroom sign —

Founded why is it called a restroom sign models & stl files for printing
Pirate Toy Box
SgtMunger
Chess Box
DangeMask
Shock Knife
BoomZilla1
Foot for Tanita Scale
reallifeonhold
Kellashee Logo For i3 Mini
The Crimson Kellashee
Tap and Die Case
MakeItMakeItMakeIt
PC fan duct
Sciyet
Orker
Polerix