However it should be noted that this study may be biased in terms of its sample (i.e.potentially those swinging couples who had stronger relationships would be motivated to complete the questionnaire, or alternatively the stress that swinging may place on a marriage means that only those with higher than average levels of commitment to their partners are able to remain married whilst swinging; additionally, couples that have jealousy or strife issues caused by swinging will not usually stay in the swinging lifestyle).The phenomenon (or at least its wider discussion and practice) may be seen as part of the sexual revolution of recent decades.
The 'prime directive' in swinging is "No means no".
Swingers also meet through lifestyle magazines, personal ads, swinging house parties, and the Internet.
Clubs are typically divided into "on-premise" clubs, where sexual activity may happen then and there at the club, and "off-premise" clubs where sexual activity is not allowed at the club, but may be arranged at a near-by location.
Swinging activities can include having sex with a partner while being watched; watching others have sex (perhaps with the above mentioned partner); kissing, stroking, or having oral sex with a third or fourth person (called soft swinging); or having penetrative sex with someone other than one's partner (Full Swap), which is the commonly understood definition of swinging.
Typically, swinging activities occur when a married (or otherwise committed) couple engages with a similar couple or a single individual. Sex on these occasions is often referred to as play.