You want to get their interest, but as this might be one of those deal breaker questions, you should get it out of the way early. There's no shame in breaking up from an incompatibility in attraction or sexual preference, but there should be some shame at sticking with it expecting another person to change for you.
Only a rather small group of people were even able to consume milk past infancy without negative health effects, and that's mostly because they were the ones that survived the famine that necessitated surviving such a diet. Lactase persistence is a recessive gene
I mean, I understand criticizing the dairy industry, but another big factor is that milk also taste good. Humans drank milk before it was industrialized.
I'm not a big fan of animal agriculture, but I don't get why milk is singled out, as if we don't consume the dead bodies of animals, bodies that weren't "meant for" anything other than sustaining itself.
And we've been doing it for thousands of years, selectively breeding and domesticating cows for the purpose. Humans drinking cow's milk is more natural than carrots being orange.
Vegans should wake up a bit. I'm vegetarian. It was never about animal suffering. There are people suffering right now. For me it's about our survival. It's unsustainable.
8 billions of us having a carnivore diet will destroy the planet dot
I think that meat and dairy are both unethical, but other animals do eat meat. AFAIK, humans are the only animal that drinks milk outside of their species. (Or drinks milk as an adult, for that matter!)