You, of course, don't think you fit into an internet generalization, but you don't want to die. What do you tell him or her?
Examples would be that you don't want a kid right now, so you'd say you're childfree. You don't have an SO and thus aren't having sex, so you'd say you're asexual. Just basic connections that no sane person would make in real life, but if you were to say it on the internet, everyone would categorize you.