Skinpaper is a speculative work by Tommaso Lanza and Vanessa Harden that explores the cross section between a living specimen and paper.
"Skin paper is made of breathable microfibres that allow for temperature regulation. As with animal and human skin, Skinpaper demands a certain level of moisture. This could be introduced into the paper in form of microcapsules containing moisturizers or essential oils. When a skin sample is sent to be manufactured into paper, it is tested to reveal the adequate levels of moisture needed to produce healthy and strong paper."
So what would you use skin paper for? As with regular papers, the ways in which it is used depends on the values people project on it. Supposedly the paper is most appropriate for a personal and intimate writings like a diaries (unsure if they still exist nowadays) or love letters.