I think whore is the wrong word here. The vast majority of women will trade up if they can secure a better partner, if they met [rich famous sportsball player] and commitment (marriage) was guaranteed, they'd drop your 9-5 cubicle ass in a heartbeat. The vast majority of women will be sluts if they can do so without repercussions (this is why girl like to go "travelling", and girl that you meet who are overseas go crazy with partying etc), even if they're in a relationship back home. There have been many books written on the subject; I highly recommend "The Rationale Male". One of the arguments is that it is inherently genetic. We've lived in various states of war throughout most of our history. When one tribe is conquered by another, the men and boys are killed; the very old and very young are killed; the loyal women that do not submit are killed; and the hot women that greet their new overlords with open legs are spared or snatched up as wives (sometimes even her children/family are spared if she's good enough). Being slutty is a survival instinct that has been bred into women since the beginning of time. You're still going to have genetic mutation that results in some women that are loyal to the grave, but that's the exception to the rule. It's not their fault, it's just who they are. If you accept women for what they are, the rage goes away. You can still have a family with them, but you just have to know that she will betray you if it's advantageous to her and her children, that she will find another to replace you in a heartbeat if you leave or she feels that you're not good enough. You just have to be much better than she is, game her properly, treat her right (passing shit tests, satisfying her in bed). Also, being smart with your resources so that she needs you to get them, and they can't be obtained though other methods (family court).