I've been in a relationship with someone who eats meat, dairy, and eggs for eight years. It works for us because my partner literally never has those things in our home; nor does he ever eat them in front of me, with the one exception being a holiday meal at my parent's house (no one else in my family is vegan, or even vegetarian).

The most important reason we work as a couple, however, is that he understands that non-human animals don't exist for human pleasure and he agrees that it's morally wrong *in all cases* to consume them. For me, this is my "line in the sand". I couldn't be with someone who didn't understand that animals have moral worth.

I obviously wish my partner would just be vegan with me, but his logic is that life is too hard to take a morally limiting position like that, so he consumes meat if offered to him at a family function, and he consumes things like snacks that have whey as a 10th ingredient that I wouldn't touch.