"God's standards" on sexuality...what are those again? Before Yahweh was invented, the old Gods didn't demand heterosexual monogamy as the only acceptable way to live. Homosexuality was no big deal, in fact, in society before Christianity came along.
Heck, even the Old Testament is full of prominent figures that had multiple wives, concubines, all completely sanctioned by the Christian God. Exodus 21:10 clearly allows for multiple wives, as does Deuteronomy 21:15. Heck God actually gave concubines to David I believe. God also allows for divorce in Matthew 19:8.
In no way is it clear that "God"...even if your talking about the Christian God...mandates one man one woman for life, heterosexual only, and no sex outside of marriage. You can find as many passages in the Bible that reject these things as you can that demand them. The laser focus on homosexuality has nothing to do with God's standards and everything to do with a certain group of modern human beings pushing their ideals...not God's...on everyone.