Promiscuity as method of coping with low self-esteem? Hm. Perhaps this isn't the best alternative to building up ones self-image in a healthy way.
I'm a man and I know that I've suffered on occasion from feeling unable, even with my best efforts, to conform to any standard of physical health or atheleticism, its bound to be a lot worse for women because the female form is society's muse, heterosexual men predominating and women sharing some of their standards and obsessions or definitions of female beauty.
However I've never considered something like this I would consider compounding the problem, I do take some consolations from traditional admonitions of pride or modesty, or in another cultural context, the buddhist one, non-attachment or non-striving.
Although I do know that my understand of these things may be different and not shared by others, its all a matter of experience and perspective, others could and I'm sure do see those views as wholey a product of an uptight or repressive authoritarian and guilt tripping order good for nothing other than producing neurotics, and perhaps they'd not be completely wrong, but its a different way to the way I understand it all.