Liberty N. Justice is the author of “How to Talk to a Live Nude Girl” in Greta Christina’s Paying for It: A Guide By Sex Workers For Their Clients, and the classic Buffy the Vampire Slayer adult fanfics “Truth or Dare” and “Gotta Have Faith.” She is now living with Multiple Sclerosis and has come out of retirement to share her thoughts on the relationship between sex, pleasure and disability.