The feminist writer Naomi Wolf has a
book on just this topic called Promiscuities.
Leora Tanenbaum's Slut similarly tackles
this topic. It's all a matter of how you
are being promiscuous and if anyone getting
hurt in the process.
Are the motivations
purely yours or fitting a stereotype or
trying to feed insecurities? These are
certain questions that one has to consider
when one is approaching it from a feminist
I hope that helps,