Buxton says that when one partner in a marriage comes out as gay, lesbian, or bisexual, about a third of the couples break up right away, a third break up after about two years, and a third stay married indefinitely.3 We don't know a whole lot about that last third--the more than 30 percent of mixed-orientation marriages that remain intact. From the research I've read, many of them are negotiating open relationships, but few consider themselves polyamorous or identify with or seek out a nonmonogamous community. As a result, they are left out of significant discussions about nonmonogamy. Research and writing on this topic (including Buxton's) makes a point of distinguishing between partners who come out as gay or lesbian and partners who come out as bisexual. Those are individual identity choices; I am less concerned with how a person identifies and more interested in the relationship between the straight spouse and the nonstraight spouse, because that ultimately determines what style of open relationship will work for them. Some couples remain primary partners and continue to have a sexual relationship, while others end the sexual element of their partnership.