If they haven't lived through thousands of years of human civilization, it's probably a little different.
I am a vampire, I do have fangs, and I do have to drink blood. Sunlight will burn me alive. I have a reflection, though. I can't eat anything aside from blood, so in that sense, garlic is bad for me. I don't have a digestive tract. I do not sleep in a coffin, but I have in the past. Not because I needed to, it just seemed like a vibe at the time.