Unless what?

Unless she pins all the photos up

"...Unless I post all these copies of this photo of me up all around school."

You look at the photo again, shocked. It's a really degrading photo. She would never be able to live this down. There's no way she would choose that over letting you have a bit of butt fun, would she? Plus, if her asshole can spread that wide, it can surely accomodate your average-sized pecker without issue.

And yet, she seems to be considering it. Perhaps it's because you've been friends since you were tiny, even sharing baths together when you were younger. She's like a sister to you in many ways, and you a brother to her. It would feel wrong to defile her. But also, looking at that photo... you really want to.

"I'm going to do it." She resolves. "I'm going to put them all up."

Not on my watch.

As you watch her tack the first copy of the photo onto the wall next to you, you find yourself reaching for your notebook, rapidly brainstorming a rule that will make this choice much worse for her.

Old rule: Any photo or image willingly posted on the wall by its owner constitutes consent for the image to be copied and shared around, including online.

"I can't believe I'm doing this." Zoe suddenly offers out loud, to herself as much as to you. "My reputation will never recover. But I can't let the alternative happen. It'd just be too wrong."

Even as a couple of guys approach the photo of her, laughing cruelly, and taking photos of it on their phones to share around, she doesn't hesitate to start pinning up more and more copies of her disgraceful image down the hall.

Wow, she really doesn't want to let you fuck her. Or perhaps adding old rules is a bad method of getting people to modify their current behaviour. It'll have to be a new rule then...