 Many fans distinguish female-focused slash as a separate genre, commonly referred to as femslash (also known as "f/f slash" or "femmeslash").These fan-written stories are not accepted canon, and the characters are usually not engaged in such relationships in their respective fictional universes.It is commonly believed that current slash fanfiction originated within the "" fan fiction fandom, with "Kirk/Spock" stories – generally authored by female fans of the series – first appearing in the early 1970s.