As a general rule, swinging couples engage in conventional segxwal activities, but with other partners. Penetrative sex by a swinging partner is referred to as a full swap; while non-penetrative sex, such as oral sex, is referred to as a soft swap. New swinging couples often choose a soft swap before they are comfortable with a full swap, although many couples stay "soft swap" for personal or safety related reasons. Soft swinging occurs when the couple engage in segxwal activities while two or more other couples perform sex acts in the immediate vicinity.
Is this also part of civilization or animal behaviour?
Pure animal behaviour. Can anyone give out his wife to be fcuked by other men and still claims he loves her?