Bob...most of the research I have done, was done by watching close friends fall into a strange trap. Other research I have done, was done by asking my very VERY sexually experienced partner (whom I've been with for 5 years now) about his experiences and the experiences of his friends who were similar in lifestyle to what you are describing. He had his bad boy past waaaay before I knew him, but he had a very common reaction to it: It was fun for a while, but pretty soon you realize that there is a mental problem with nearly everyone who joins that lifestyle. They are usually not doing it just because they are really into sex and are good at it (which was his position), but instead, they are emotionally damaged and they are seeking to subconsciously fix internal problems through sexual activity. Maybe that sounds weird, but it happens all the time.
The easiest example of this would be the young woman who has daddy issues, cozying up to and having sex with men who fulfil a father role, maybe even marrying him. The problem with this young woman is that cozying up to a father figure will NOT solve her actual problem. But because of the way human nature works, she will be led to those sexual encounters, and tell herself all the way there that "this is what she wants". She may have no clue that she is actually being led to do this by an emotional problem inside of her, and therefore, its not actually what she wants....what she really wants is to deal with this problem but she has no idea how.
And so beyond my own close friends and my partner, I have also done a lot of reading on both sides of the subject: the side of the swingers and the side of people who used to be swingers and who have lost their partner (and possibly lost a lot more than that) due to swinging. Unfortunately, the time in my life when I did most of that reading was several years ago and I don't know what websites, etc, I was looking at....so I can't give you any direct resources, sorry.
I hope you do the research on your own anyway though.....
