Please Pay Attention, I only want to say this once:
I am not a vegetarian so you can tell me how much you love meat, and that you could never stop eating it. I don't advertise that I don't consume dead animal flesh, but I can't help that it comes up in conversation on occasion. When it does, don't talk about eating the muscles of some dead cow. Don't talk about how delicious it is. I don't want to hear about it. It's not cute. You are not being funny or even remotely original. Nearly everyone does the same goddamn thing.
As most of my friends can attest to, I am more than capable of taking a joke. We joke all the time about my various flaws and shortcomings. However, some people have convictions which they hold close to their hearts. It's common decency to not attack those convictions unless otherwise provoked. I am not trying to convert anyone, so I can't imagine what I do to provoke such behavior. If you ask me about my diet and why I choose it, then I might tell you because you just fucking asked. That isn't an invitation to tell me about how you love eating a pig that was probably more intelligent than your dog. I don't care what you put into your body, whether it be pork, chicken, alcohol, LSD, or drain cleaner. Although, chances are I don't like you, so let me go ahead and suggest the drain cleaner.