Wife swapping

Swinging, sometimes called wife swapping or partner swapping, is a non-monogamous behavior in which both singles and partners in a committed relationship engage in sexual activities with others as a recreational or social activity.

The phenomenon of swinging, or at least its wider discussion and practice, is regarded by some as arising from the freer attitudes to sexual activity after the sexual revolution of the 1960s, the invention and availability of the contraceptive pill and the emergence of treatments for many of the sexually transmitted diseases that were known at that time.

The swinger community sometimes refers to itself as "the lifestyle", or as "the alternative lifestyle".

People may choose a swinging lifestyle for a variety of reasons. Many cite the increased quality, quantity, and frequency of sex. Some people may engage in swinging to add variety into their otherwise conventional sex lives or due to their curiosity. Some couples see swinging as a healthy outlet and means to strengthen their relationship. Others regard such activities as merely a social and recreational interaction with others.

Swinging can take place in a number of contexts, ranging from spontaneous sexual activity involving partner swapping at an informal gathering of friends to planned regular social meetings to "hooking up" with like-minded people at a sex club (also known as a swinger club, not to be confused with a strip club). Different clubs offer varied facilities and atmospheres, and often hold "theme" nights.

Swinging is also known to take place in semi-public venues such as hotels, resorts, or cruise ships, or often in private homes. Furthermore, many websites that cater to swinging couples now exist, some boasting hundreds of thousands of members.

Swinging itself is not a high risk behavior, and swingers have lower rates of STIs than the general population. Swingers are relatively knowledgeable about STIs and their symptoms, and are more likely to seek prompt medical treatment if symptoms arise.

According to 2010 estimates by the Kinsey Institute "swinging is relatively uncommon in the United States".

...
Wikipedia