Public restrooms are always host to people sharing a lot of private information regarding them. From numbers to other stuff, people do get creative with what they share in public restrooms. There really isn't any limit to it, and anyone can come and share what they want about themselves. Thus, if you go and take a selfie in a public restroom, please be careful of all the explicit messages hovering around there.
This girl wanted to take a photo in a public restroom and wanted to be quick with it, so that no one could walk into her taking the photo. However, there was one thing that she had not accounted for; the message behind her head. Someone there had taken up the liberty to write 'I Masturbate', and we can't think of one good reason why they would write this there.