She is a cutie, but I mean this post, the site posted it on their tumblr. It showed up on mine because I follow them, that’s how I actually found this site.
Unfortunately it’s not a very well know fad, as occasionally you do get a vanilla lady wearing one who is none the wiser and can lead to a little bit of embarrassment. My only advise would to be if a lady is wearing one then try to look and see if and what charm is on it.