In the context of BDSM, forced homosexuality refers to play (or a "scene") in which the submissive partner is forced, by the dominant partner, to participate in sexual activity with someone of their same gender.
More About Forced Homosexuality
It is important to understand, in light of the presence of the word "forced" in this term, that prior to any play a dominant and a submissive should negotiate what play they will be participating in. In these negotiations the submissive partner would consent to being "forced" to engage in forced homosexuality.
