c.1984, The American Film Institute catalog of motion pictures produced in the United States, volume 1, American Film Institute, published 1999, page 369:
An investigation into human sexual behavior reveals four different modes of erotic involvement: sex between lovers, called “love-sex”; “money-sex” including all relationships motivated by the desire for material gain; casual or “like-sex”; and “hate-sex”, which includes rape.
2009 August 1, Jonathan Bernstein, “Jonathan Bernstein's aerial view of America”, in Alan Rusbridger, editor, The Guardian, London: Guardian News & Media, →ISSN, →OCLC: