Over a series of four studies, researchers found narcissistic tendencies have a significant impact on spending habits—specifically, the desire to find and purchase items that are exclusive, personalized, scarce, and promote personal uniqueness. Interestingly enough, it’s more about self-regard than it is self-esteem. In one study, participants higher in narcissism had the desire to purchase something that helped cultivate their personal style and keep them from looking like everyone else, while those higher in self-esteem simply didn’t possess the craving. It all links back to a narcissist’s keenness to elevate themselves, says Michael Mantell, PhD, a psychologist who specializes in behavioral sciences. “Money equals love for a narcissist,” he says. “He or she has a grandiose sense of what they can buy and should be able to own, including reckless spending.” Other things on the list a narcissist often feels entitled to? Protection from the rules—which Mantell also attributes to the desire to live beyond one’s means. But why, if a narcissist is all about themselves, do they even care about what everyone else owns? “The more they distinguish themselves from others, the more proof they have they are in fact, different, better, or more important,” explains Dr. Mantell. Another, also problematic root of the cause: self-concealment. “Keeping people distinguished from them also prevents others from knowing their faults,” he says.  Next time you feel that burn of purse/shoe/house envy (we’ve all been there), remember: it’s not your personal effects that make you special—its your kindness, warmth, and commitment to your health that keep your friends and family close.  More from Prevention: Is Your Ego Hurting Your Health?