If you've reached the point when you're so anxious about having sex and/or dating someone just because you think there's 'something wrong' about you, you're going to have a bad time, you know.
I think most of the self-proclaimed asexuals of Tumblr are just going through a phase of thinking they're better than everyone because they're not fucking like rabbit like normies!11!!!!1!!1 or they're under peer pressure to have sex or hang out with someone they don't like, so they hide themselves behind terms like asexuality, instead of having the balls to say "yo, I don't want to have sex now, or I'm not interested" and just let it happen naturally.
It's just like high school, everyone is full of hormones and such, so they go around screwing everything that walks, and anyone who isn't doing it start to indetify as demiocupioromanticsexual to justify their actions when it's really a case of just, you know, stop focusing so much on others.