"She's an American beauty / I'm an American psycho." Who knew Fall Out Boy maybe just wrote the anthem of the social media generation?

Watch out ladies! If your boyfriend is constantly posting selfies, he might be a psychopath. According to a new study from Ohio State University, which surveyed "a nationally representative sample" of 800 guys between 18 and 40 about their selfie habits and personality traits, a man's obsession with uploading his own face to the internet doesn't suggest the perfect picture of a healthy mind.

“We know that self-objectification leads to a lot of terrible things, like depression and eating disorders in women,” says lead researcher Dr. Jesse Fox in a press release. “With the growing use of social networks, everyone is more concerned with their appearance. That means self-objectification may become a bigger problem for men..."

The surprising result, however, is that dudes obsessed with their own appearance aren't just vain -- they may have psychopathic tendencies. Hey, wasn't there a book/movie about that?

"We examined the Dark Triad (i.e., narcissism, Machiavellianism, and psychopathy)," the researchers write in the paper, published in the journal Personality and Individual Differences. "Narcissism and psychopathy predicted the number of selfies posted..."

But psychopathy is less likely (merely narcissism) if a guy edits his selfies -- such as cropping, adding Instagram filters and photoshopping out zits -- to make himself look better.

“That makes sense because psychopathy is characterized by impulsivity," Fox said in the press release. "They are going to snap the photos and put them online right away. They want to see themselves. They don’t want to spend time editing." (As for clone-stamping out flaws, she added, "Most people don’t think that men even do that sort of thing, but they definitely do.”)

The researchers are careful to note that none of the men surveyed appeared to be full-out psychos, and just because a guy uploads a lot of selfies, that doesn't necessarily mean anything. Still, ladies, it's yet another reason to pay attention to a guy's profile before dating him -- but don't worry, the same academic team is studying whether the link holds true for women next.