What I meant was: why do straight people oppose gay unions/marriages when it has nothing to do with them?
The people that do oppose gay marriage typically do so on religious or moral grounds or on a belief that, like any public policy, it has impacts on society at large.
Personally, I think the religious or moral reasons are more often specious than not. Conversely, if opponents are right on the public policy issues (and that's not an argument I'm prepared to endorse right now) then it does have something to do with them.
Either way, when you're discussing public policy it's generally better to leave it to the voters and their elected legislators, not judges.
