...for your thoughtful comment. Although you describe an extreme case, it's true that the motivators--both good and not so good-- that get into our heads can become very powerful. We have to stay in balance. That's why in the blog I caution that "vanity has a sinister, as well as a shallow, side. When it leads to an unhealthy obsession with looks or to eating disorders, there’s certainly a problem. But if you make sure your vanity serves a health goal, you run less risk of crossing over to the Dark Side." In other words, it's good to combine vanity with a higher motivator to prevent the kind of problems you mentioned.
Thanks, Anon. I appreciate the opportunity to clarify my position.