to clean them, to inspect them, to repair the plumbing (yes, there are female plumbers) and to use the facilities when the women's room is out of service or otherwise unavailable.
So they can talk girl talk.
Because for whatever reason women see the bathroom as a social gathering spot.
It's pretty much where they gossip, perfect makeup, or trash talk whereas they can't at...
If you feel like you need to go to the bathroom, But don't go, Don't worry about it because it might just mean your stomach hurts, Or is gonna hurt. It also could mean that the poo or pee isn't ready...