I think about the same thing from time to time and my thinking is along the lines of Crazy Eddie when he says "For me the turn-on comes more from the thought of her getting so turned on she couldn't stop herself from crossing the line, and then getting pleasured so much she could barely stand it. Not so much "Dude, I'm going to share my wife with you", but "Dude, help me give her the most intense sexual experience she's ever had" or "Dude, give her the best sex of her life and leave her barely able to walk"..
I differ in that its not to take notes. Its more voyeuristic than anything. In a way the opposite of the Madonna sydrome. Not whore but slut. The term slut has negative connotations for most but I once heard a woman on the radio talk show challenge that. Whores do it for money while sluts do it because they enjoy it. Why is that bad she said? Not necessarily having sex with anyone, but with anyone she desires and who is worthy of her and she is free to enjoy herself to the fullest.
The wife gone wild is a very popular fantasy; my wife and I recently picked up a copy of Penthouse Letters and 2/3 of the stories were about wives having fun while their husbands watched. Not sure if its a lack of confidence or all these guys are non ALPHA males or perhaps the husbands have wives who are somewhat reserved in bed and would love to see them lose their inhibitions. I do know that female sexuality is very beautiful and erotic and that must have a lot to do with it. I also think there is something to the effect of wow I have someone really special who is Goddess like in her desires.
Finally, I do agree with MJ comment
"The solution is simply that the HDW have to start acting like "whores" , not really "whores" but something more like "b*tches". Some men just get turned on by the drama of having their *ss kicked to the curb "
I agree. Maybe not a b*tch but a high maintenance from the prespective of I am special and deserve to be treated well. Very confident and assertive and from a man's point of view very attractive. Something along the lines of "You will ML to me 2-3X a week and if you are too tired use other parts of your body to satisfy me"