Who better to teach us about power — how we can hold it, get more of it, and use it to our advantage — than dominatrixes? Lindsay Goldwert is the author of the book, “Bow Down: Lessons From Dominatrixes On How To Get Everything You Want,” and she says even women who aren’t comfortable with the concept of control can learn to assert it. It involves practice, asking tons of questions, and learning to negotiate. In Mailbag, Kathryn and Jean talk about credit card rewards and financial priorities, including debt payoff vs. retirement.