I'd always hoped it was just a bad joke and they didn't really exist. It's just so pathetic.
I've always wondered why it is okay with people who swap for their spouse to get boffed by someone else's spouse, maybe even with people watching, but if the spouse does the same thing in private, unbeknownst to their husband or wife with some single person of their own choosing, it is against the "rules" and can have nasty consequences, to include divorce, or a violent confrontation. What logic is there in making fine distinctions in what is still adultery, no matter how you spin it?
I'm doing some paneling for my loony liberal customer today-I'll come to class later-now where did I leave those earplugs...