"I'm running an erotic roleplaying game. No, we don't actually have sex, we just write stories about characters we made up for a world that doesn't exist, and they're having sex with each other. No, those are computer-generated graphics; this is text-only adventures, and it only continues at a decent pace if multiple people are in the same time zone and on the same sleep schedule. Of course it's not boring, how dare you!"
I'm not saying we're boring, I'm just agreeing that it's one of those things that's hard to properly explain without getting weird looks.