I only ever heard *** of one couple who did this, in "Mortgaged Suburbia". SHE was having a great time, HE was ignored by most of the "swinging" ladies. SHE is still alive. HE was fished out of the Thames. Maybe not as a direct result but it appears to have been the beginning of the end of their marriage.
Musically speaking, he was a Jazz fan who discevered and played me Country Joe, Love and The Airplane etc.
*** I heard this third hand but knowing the man I was saddened but notsurprized.
If yoiu're not sure DON'T