I worked for several years with gal who could do this ...without any extra equipment so to speak.
She wasn’t shy about it at all and since we had only one bathroom and an unlocked door I have walked in on her.
She would just giggle and explain it.
Her other job was working as a glamour beer girl promoting stuff at bars and restaurants.
Think Swedish Bikini Team.
Problem was the women’s rooms at a lot of places had huge lines while the men’s rooms were less crowded.
So she and her other team mates figured out how to use the men’s rooms.
Anyone who has gone to the theater, and then to use the facilities during the intermission..has see this. The lines into both the men’s and women’s rest room are long. The men are usually done quickly..the women’s line creeps along..it takes them longer. When the lights blink to return to seats, all the women still waiting look around nervously, then gather up their courage, and they all run into the men’s room to use the stalls..