6. In the best sex scenes, people often have something to lose. This goes along with the notion that sex is about other things besides sex. There’s a reason why we’re more interested in sex between people who are emotionally vulnerable, or cheating on someone, or trying to prove something, than in sex between two well-adjusted people who are feeling completely secure. A good sex scene is quite often suspenseful — like, if this doesn’t go the right way, someone is going to be in a bad way. If both people in the scene are trying to show that they’re in control of what’s happening, that can be more interesting — but so can watching someone who’s always in control give up control, and face the potential consequences.
—Charlie Jane Anders, How to Write About Sex Without Being Boring
Really helpful advice for the current play I’m working on.