My experience says that, especially if both women aren't very into each other, the risk is not really worth the reward. If both girls are doing it with the goal of getting the guy's primary attention, things can only succeed if there is a very delicate balance.
I understand your question though Sultana. I think I'd have to be chalked up as one of those "fantasy/reality" people. Sounds great, but probably not something that would really pan out to be as good in reality.
