"Researchers have a few theories about why lesbian couples are likelier to end their marriages than gay male couples. Among heterosexual married couples, women are also likelier to file petitions for divorce than men. Women also tend to get married faster than gay men and are likelier to have previously been married. Finally, women do not tolerate marital misconduct like adultery as much as men do."
That tracks. There's probably a lot more gay men that don't choose the base monogamous lifestyle, so they don't jump to getting married right away (looking at you, U-Haul lesbians) and don't see sex outside the couple as immediate deal breakers.
Shit, I just realised there isn't an openly gay man in the entirety of ORS. And no strict lesbians, just lots of straight men and bi(curious) women.