psht, they're about as happy you came by as you are about them
It's a lot better then walking into a guy's bathroom and hearing a guy "wiggle the walrus".
Her* not their.
Guys bathroom's are way better. We get in and get out, thanks to urinals.
Maybe they're killing time or just self-conscious. Get off their ass.
One of my friends does that - I think it's hilarious! I told her she always does it and she denied it and about 10 seconds later she saw her reflection in glass and started patting her hair self-conciously :) I cracked up!