There is a learning curve in swinging that pretty much requires an openminded approach and a grasp of the concept that it takes time to find your niche or to hit your stride. Think about dating and how difficult it was to find a partner with whom you clicked and where attraction, conversation, and sex came easily. Multiply that by four and you'll understand why this hobby isn't for the faint of heart. To answer your question, we started with firm rules and a determination to find a really good match. Those are few and far between. Over the years, we have, through trial and error (lots of errors), refined our selection process to the point where we have had a lot of success in finding fun and compatible couples. Rather than looking for that perfect couple, we start with certain parameters, HWP, non smokers, educated, with well written profiles and certain body types. We meet and assess in person. Since we recognize that the "Wow" factor often won't apply to both parties in the other couple we generally accept that one of us will be quite attracted to one part of the other couple. After that, our decision is based on whether the other partner is considered "doable". If not, we go no further. We've had some really great times and repeated them with couples where I found the wife very attractive and Mrs Doc thought the husband was doable or vice versa. Sometimes, we've found that the less obviously attractive part of the couple kinda sneaks up on us and suddenly there really is a Wow factor. Back to the learning curve, this hobby isn't as easy as bowling or bridge, but when you win in this, there are orgasms.