Completely grossed out by what Stanley is up to, you realize that not only is this a sight you never want to see in the library again, but you may as well play with Stanley a bit as well while you're at it. "He's a good buddy though, so nothing too permanent." You think. "But gross, he definitely needs to be taught a lesson."
You then bring out your notebook already having in mind what you want to do. It's not that you have a problem with people pleasuring their bodies, but you definitely don't want to see some dude doing that in a public space like the school library.
With your pen, you write the following in the notebook: "This library now has a curse, that has the following effects:
* Whenever a guy realizes he's been seen masturbating or lewdly exposing or groping his body in the library, his body will over a few minutes transform into that of a gorgeous girl with similar genetics as if they had been born as a girl.
* She will also have a body with curves, frame and size similar to her ideal dream girl from when she was a boy.
* While they have a female body, the transformed person will think of themselves as a girl and will consider her name to be the first girliest and most embarrassing name she can think of.
* She will still retain her memories of her life as a boy, but everyone else except for those who have read this note will think the person transformed by the curse has always been a girl.
* Her clothes will match the ideals for what her male self's ideal dream girl would wear as well.
* The newly transformed girl will also have her behaviors and thoughts become more feminine and girly the more they notice themselves behaving girly in any way.
* The new girl will be highly attracted to boys and have a growing desire to have her pussy filled with a cock and fucked until she screams out while orgasming.
* Every time she orgasms she will become more like the ideal dream girl for whomever was fucking her while she comes.
* Since they like to masturbate in the library, they will also have an exhibitionist kink, where they desire to be caught masturbating and doing lewd things in public.
* While the curse is active, no one will think it's unusual that the girl is behaving in the ways that have been influenced by the curse.
* The transformation curse will last for 24 hours, at which point their body will transform from a girl back to their former male body and everyone will remember them as who they were once more.
* However, if they trigger this curse by being caught masturbating or doing lewd acts in the library for 3 or more times, then the transformation into a girl remains permanent. The curse will have run it's course for the transformed girl, never able to affect her again, and she will live out the rest of her life as a female."
You finish writing the note and then slightly *cough* loud enough for Stanley to hear. Stanley looks up embarrassed, but then the curse kicks in. He starts to try and put his junk away, but then stops as the exhibitionist kink kicks in. Then he finds himself unable to stop playing with himself as his body and clothes transform into that of a beautiful girl.
At first she seems a bit surprised at the changes, but she also seems relieved. As the desire to have her pussy filled with cock has already sunk in. She's still looking over her shoulder at you, her chest heaving as she knows you can see her masturbating. She knows she used to be a boy, but right now, she also knows she's all girl. Her face flushes and she bites her lip before looking at you longingly...