It turns out that, for many years, Michael was living the swinger lifestyle going to parties and having sex with lots of women while his girlfriends (and later the woman who became his wife) had sex with other men. It was easy for me to imagine that a man would enjoy having sex with several women in an evening with no strings attached. What puzzled me was how Michael dealt with the fact that the women in his life were having sex with other men. I got an answer to this question I never would have expected!
http://www.amazon.com/Cuckolding-Car.../dp/B009WD8TCW