The more partners you’ve had in your past, the more miserable you’ll be with just one, because your mind becomes accustomed to variety. Each time you invest emotion and physical intimacy in a new person, you condition your psyche to seek more and more variety and novelty. You will then find it impossible to emotionally invest in intimacy with a single person. And intimacy with one person is more intense than any promiscuous lifestyle.
Chastity, both for men and women, is not about religious piety or the emotional blackmail and threat of public shaming. Morality coerced by fear is meaningless.
Meaningful chastity cannot be achieved through threat. It can only be through incentive. The incentive is a better happier life with intimacy in one person who fulfils you even though he/she isn’t perfect. But you don’t want the person to be perfect; you w ant the intimacy to be perfect.