The authors of the study batted down the common belief that casual sex can screw you up, writing:
"Although there has been speculation in public discourse that sexual encounters outside a committed romantic relationship may be emotionally damaging for young people, this study found no differences in the psychological well-being of young adults who had a casual sexual partner verses a more committed partner."
Of course, if you like to hook up you're still on the hook for other risks. The authors rightly pointed out: "Our findings do not minimize the legitimate threats to physical well-being associated with casual sexual relationships, and the need for preventive messages in sex education programs." Practice safe sex everybody!
Source: Flcikr User Vmiramontes