I'm sort of chaste and attempting to write porn, which might mean it'll turn out really bad, but we'll see

It might be the other way around: Perhaps you write better porn the less real sex you have? Getting your fun /somwhere/.

after my last ex, the thought of sleeping with a man again is vaguely nauseating

Sounds like there's a pretty awful story behind it.

Sex is generally a waste of time

I don't really think so, but the entire how-to-get-there, with dating and stuff definitely is! Plus, I'm really bad at flirting and all the other pre-mating rituals, like dancing and movies, and wish you could just walk up to someone and say, "Hey, you, you're pretty. Wanna sleep with me?" Sadly, this seems to be frowned upon. *ggg*