That’s partner swapping, or wife swapping in the mid 20th century, which is a subset of swinging. Plenty of swinging is bunches of people in a pile, or mingling and pairing. They’re supposed to be consent and boundary conscious, but are not always (especially when booze or drugs get involved) which is the primary source of sore feelings and getting uninvited to future events.
Aren’t swingers looking to trade partners? Not do 3ways without the other usual consenting person knowing?
That’s partner swapping, or wife swapping in the mid 20th century, which is a subset of swinging. Plenty of swinging is bunches of people in a pile, or mingling and pairing. They’re supposed to be consent and boundary conscious, but are not always (especially when booze or drugs get involved) which is the primary source of sore feelings and getting uninvited to future events.