It always been from ages. the whole point is to try different variety. This has been human desire from start. It keep coming in many shapes and form. Swapping and swingers brought to mainstream, without being rich or powerful one can enjoy.
It must have crossed everyone's mind if you ar financially secure and little stress free to enjoy this. I do not think cuckold is majority, stag and vixen it .. but majority fuddu here quickly term as cuckold and joker claiming to bull this that will start messaging. One example, myhandle itself created so many attention - shows the mentality.
Also most folks who are real swingers/swapping will want use their free time in doing actual thing instead of logging here