I just started reading this thread. Very interesting. My wife and I had this conversation. Surprising to me she was very calm and open minded. But, she was very firm that if, and she stressed if this ever happened I was never allowed to be with another female. I was adamant in my response that I don't ever want to be with anyone but her. So, my motives are twofold. I know I cannot give my wife the pleasure she deserves as there are times I have trouble getting and maintaining an erection without the help of Viagra. She is much more highly sexual that I am and 12 years younger. But, selfishly I have this burning desire for humiliation and seeing my wife being taken and completely satisfied with a man with a big thick hard cock makes me feel excited and useless at the same time. It is as much emotional as physical and that is the motivation behind my desires to be cuckolded.