Easy swing - a prelude to other partners, sometimes with oral sex, but without vaginal penetration. Another meaning of the term - sex couples with a third partner.
Closed swinging - sharing partners for the weekend for a classic sex in private.
Outdoor swing - group sex two or more pairs with an exchange partner in front of each other.
Soft swing - sex, in which couples do not share their partners have sex only in close proximity to each other, either in the same room.