OK, I admit it, I got side-tracked from writing erotica!
Instead, I'm putting together a how-to book I'm calling The Vanilla Dominatrix. It's about how to sell yourself as a part-time slave to your partner, without changing who she is, and without nagging or manipulating.
The concept is; what would she act like if you really were her slave, and she felt OK about that?
What got me started on this, was the fascinating discovery that some Ancient Roman ladies, really did use their male slaves for more intimate purposes.
Male slaves obviously offer some unique benefits to non-fetish, i.e. vanilla mistresses. The trick then has to be to make sure that the benefits outweigh the cost to her.