Men who post too many selfies are narcissistic and psychopathic
The men were asked how frequently they post a picture of themselves, and whether they edited the pictures by cropping them, applying filters to them, or employed photo-editing software. Men who edit their online pictures before posting them, ranked higher for narcissism and self-objectification. The latter means that you value yourself based on appearance and not for other positive traits you might have. This behavior can lead to eating disorders and depression. It is a vicious cycle. Men who score higher for self-objectification post more selfies, seeking to hear more feedback about their appearance, which leads to the posting of more selfies.
The survey didn't show that all men who post an inordinate number of selfies are criminals that you should stay clear of. They did score in the normal range of behavior, albeit with a higher degree of anti-social activity.
source: OhioStateUniversity via Gizmodo