That's the main point. People SHOULD, MUST ask artists for NEW stories, NEW characters. Don't we all get most excited when we see this or that characters (especially in incest/taboo stories) have sex for the first time, first forbidden sexual touch, breaking of taboo? That build-up, feeling of they doing unthinkable... that's the best part, let's be honest. So, artists absolutely SHOULD close stories sooner, and start new stories much more often. Again, when we talk about "incest fantasy" stories that is almost dominant, absolute truth.