"Always already a cultural sign, the body sets limits to the imaginary meanings that it occasions, but is never free of an imaginary construction. The fantasised body can never be understood in relation to the body as real; it can only be understood in relation to another culturally instituted fantasy, one which claims the place of the "literal" and the "real." The limits to the "real" are produced within the naturalised heterosexualisation of bodies in which physical facts serve as causes and desires reflect the inexorable effects of that physicality."
-- Judith Butler, Gender Trouble, pg. 71.