Hookups and depression?

A new study in The Journal of Sex Research found higher levels of general anxiety, social anxiety, and depression in those of the 3,900 heterosexual college students across the US who had recently had casual sex. “Casual” in this case was defined as sex with a partner known less than one week.

Dr. Melina M. Bersamin of California State University, who led the study, says the results "suggest that among heterosexual college students, casual sex was negatively associated with well-being and positively associated with psychological distress."

I’m no behavioural psychologist, but I am a sex-haver with anxiety, so my question is this: is it perhaps, maybe, possibly possible that sex feels good and we seek out things that feel good when we’re distressed? And that’s okay? And these studies tend to reek of a search for a “cure” for promiscuity? Hmmmm?