[curiousagain]

Ditto to the reasons JNCC gave and I might add that just as habituation is often given as the reason some begin swinging, it is also the reason some give it up or slow it down. After a while it's kind of a been there done that, feeling. Or, after having to almost go into the witness protection program to get a way from a couple of drama laden/clinging/controlling couples they get the "it's not worth the hassle" feeling.

Just as people begin swinging for a lot of varied reasons, they slow it down or stop it for a multitude of reasons.