"On level 14, Elizabeth is falling in love. This is what makes her such a good sales rep, and an emotional basket case: she falls in love with her customers. It is hard to convey just how wretchedly, boot-lickingly draining it is to be a salesperson. Sales is a business of relationships, and you must cultivate customers with tenderness and love, like cabbages in winter, even if the customer is an egomaniacal asshole you want to hit with a shovel. There is something wrong with the kind of person who becomes a sales rep, or if not, there is something wrong after six months."