It's been a while since this has come up
I think there should be a forum on how swinging fucked up everybodies marriage.
It amazes me that people don't get that if swinging affected a marriage or relationship negatively that there was obviously something wrong in the first place. A lot of couples seem to think that swinging will fix things and we all know that will not happen. I do believe it will magnify a problem and open the door to other issues that may be there.
So if you want to find out how strong your relationship is...then by all means, swing. You will find out in a heartbeat.