The reason that the homosexual rights movement has managed to pick up such a large contingent of heterosexual fellow-travelers is simple: Because once that taboo is abrogated, no taboos are left. I once heard a heterosexual Episcopalian put it this way: If I don't want the church poking its nose into my bedroom, how can I condone it when it limits the sexual freedom of homosexuals? That might sound outrageous, but if you still believe that the debate is over the religious status of monogamous same-sex relationships, please be prepared to point out one church somewhere in the U.S. that has opened its doors to active homosexuals without also opening them to every other form of sexual coupling imaginable.- Ronald G. Lee, "The Truth About the Homosexual Rights Movement," Feb. 2006
http://www.orthodoxytoday.org/articles8/Lee-The-Truth-About-The-Homosexual-Rights-Movement.php
That is a good point: All kinds of sexual sin are birds of a common feather. People who commit other kinds of sexual sin tend to ally themselves with the homosexual rights movement.