When many people start to swing, they have a clear set of likes, dislikes, and boundaries to which they adhere. As your experience has grown, and fantasies have been "ticked off" the list have you moved the goalposts? Do you find that you are seeking new and different things in order to maintain "The Buzz?" Or is the act of swapping partners enough to keep you excited?
I have a vanilla friend who, whilst single, was very into cruising & cottaging etc. He has now been with his partner for almost a year, and was telling me that they have gone from being absolutely not into W/S, to giving it a go & quite liking it. The motivation for experimenting & moving the boundaries was borderline boredom.
I'm going to quit the waffle, and hope that you can find an interesting talking point in there somewhere. I knew what I wanted to post- an hour ago- but then got distracted by instant messaging & lost focus
In short, I suppose, have you evolved?