I'm ashamed to admit this but my mind is consumed by sexual fantasies that involve humiliation. First off, I'd like to start off by saying that I love my wife dearly and would NEVER cheat on her as I consider it morally wrong. For that reason alone, I can't understand why my mind is consumed by fantasies of my wife being intimate with other men. I seriously get turned on by the thought of watching another man penetrate my wife or by her orally pleasing another man. I also have a spanking fantasy where my wife straps and paddles me like my stepmother did when I was a teenage boy. I think about these fantasies quite often throughout the day and feel ashamed because my wife is a good woman. Any advice on what's normal regarding fantasies and what's unhealthy?