Q: What does Buddhism teach about gay marriage?

A: Buddhism has no "position" one way or the other about gay marriage, as gender orientation isn't really an issue in Buddhism.  What Buddhism teaches is that attachment to one's passions can be an impediment to awakening whether one is in a gay relationship or not.  In other words, if we become too attached to sexual desire (or to desires of any kind for that matter) it can significantly hinder our progress.  This is not to say that people should not have emotional/physical relationships, but rather that such relationships should be pursued with compassion, wisdom and loving-kindness.  Loving personal relationshps can go a long way toward assisting one's progress toward ultimate liberation from suffering.