Are you strictly dating vegans? Maybe you are open to dating vegetarians? Maybe you view it as a personal choice and you don’t mind dating non-vegans?
Does the goal of the relationship change your answer? If it is a long-term relationship, or a short-term one, or a casual one, or friends-with-benifitis or even a one-night-stand?
I’m omnivorous (currently), but if my partner were vegan, I’d probably go vegan too eventually, especially if they wanted me to. So maybe you can even convert somebody
Don’t you think that that is a terribly unhealthy expectation to come in to a relationship with?
I think there are people out there who would be willing to go vegan but haven’t found a good reason to yet. As in they know that it’s a good thing to do and they don’t have weird attachments to animal products, but also don’t mind consuming them. From the perspective of someone who still eats meat (me), going vegan seems daunting with all the habit changes and possible health issues and whatnot, but with a good nudge from someone, they might make the switch.
That is, of course, hard to know about someone beforehand, but you can just ask. I, for one, wouldn’t mind the question “Would you be willing to go vegan?” (and would probably answer with yes), at least not any more than “Are you vegan?”.
I don’t know, maybe that’s just me though…