It's written (body writing;slutification)

"You like coffee?" John's neighbor said.

"Yes, thank you."

He looked at the woman tip toeing to get the coffee machine on the top shelve. He could see everything he managed to write on her back. "Naked at home" was the obvious one, since she was fully naked in front of him. "Always horny", "spank bitch", and "anal only" would probably show their effects later.

The marker was an amazing tool, it changed a lot of things in people. His lovely neighbor was a good guinea pig. The coffee was a good excuse to be around her as her libido was driving her nuts.

"Did you always looked so handsome?" She asked at one point.

"Did you only noticed now?" He said jokingly.

"Apparently."

She walked around the table and turned his chair.

"Wanna fuck my ass?"

"Sure!"