[AntiGuv]

Evidence from European nations which have legalized marriage or civil unions suggests otherwise. Gays & lesbians are less likely to commit than straights, while those that do commit are less likely to separate than straights. One surprising result of Scandinavian trends has been that gay men are much less likely to separate than are lesbians, once they have 'married' (which they are also less likely to do than are lesbians).

[VRWC_minion]

I would expect gays and lesbians to be less likely than heterosexuals to commit. But I also would expect a large percentage of them to commit without much thought.