Why do women go to restrooms in pair?

I am female, and I like to have someone with me when I head to the restrooms. It is not to gossip or anything, I just do not like to go alone. I like to know that I have someone with me. If I am in a group, I like to take one of the people with me so that I am not the only one walking off. Maybe it is a fear that the rest of the group will leave somewhere? Maybe it is because I do not want to be the only one that they are waiting for. Either way, I do believe that it is something subconscious.

They likes to have companies in case they met prevert in the restrooms. They like to gossip inside the restrooms.

Not much have idea but in reality they do not go inside the restrooms together because they don't want to see what each other is doing,maybe they go together to have somebody to hold the door.lol