My wife and I got into it with another couple , long time friends , and it was great while it lasted which was many years . There were a couple threesomes involved in the mix . MFM and FMF and they were out of this world as well . It stopped when , unbeknownst to me , the other guy started getting to be too much for my wife .
There were no issues that came of it and we are still great friends .
But I still miss those days .