 Many early slash stories were based on a pairing of two close friends, a "hero dyad" or "One True Pairing" such as Kirk/Spock or Starsky/Hutch; conversely, a classic pairing between foils was that of Blake/Avon from "Blake's 7".The first K/S stories were not immediately accepted by all "Star Trek" fans.Later, authors such as Joanna Russ studied and reviewed the phenomenon in essays and gave the genre more academic clout.