Taylor Swift has denied that she is a serial dater, but everyone else in the real world is calling her out on that based on the tabloids and litany of break-up songs. As a therapist, there is nothing wrong with using your life experiences to create art as a means of processing the experience and finding a place of healing from that artistic process. In fact, it's what is suggested many times for clients who have those talents. It just so happens that Miss Swift can make, and has made, a killer profit from her break-ups.
Let's take a step back, however, and look a little bit into her life that is known about her. She happens to be a native to a suburb of Reading, PA, Wyomissing, born in 1989. She released her debut album in 2006, not even twenty years old. Just what were you doing at eighteen years old? Graduating high school, starting college, going into the work force, perhaps taking a year off to "find yourself"? At eighteen, Swift was making it big, landing into more money than she likely knew what to do with, and hob-knobbing with famous people that she perhaps only dreamed about previously. At eighteen, your brain is not ready to handle big decisions like she was making, and serial dating is an age-appropriate, normal thing for someone her age to be doing, it just happens that she has to be "normal" in the spotlight of stardom.
She's now in her early twenties and perhaps she is looking to settle down, that wouldn't be surprising at her age, but it also would be normal for her to keep doing some soul searching and dating around as well. Most of her peers from school may just have graduated college and beginning their careers, whereas she is perhaps more comfortable wit her level of fame now and more accustomed to the spotlight that she has been given. So what if she dates around? It helps her create music for teenage girls to belt out when they're heartbroken themselves and offers a glimpse of normalcy into her life.