Research on swinging has been conducted in the United States since the late 1960s.
One 2000 study, based on an Internet questionnaire addressed to visitors of swinger-related sites, found swingers are happier in their relationships than the norm.
Swingers are relatively knowledgeable about STIs and their symptoms, and are more likely to seek prompt medical treatment if symptoms arise.
Red rings represent the passion and unbreakable bond between the couple, the yellow background represents the light and fire of desire, the blue color of the vastness of the sky Swinging can take place in a number of contexts, ranging from spontaneous sexual activity involving partner swapping or adding a third or more participants 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).
Stossel's report in 2005 cited Terry Gould's research, which concluded that "couples swing in order to not cheat on their partners".
When Stossel asked swinging couples whether they worry their spouse will "find they like someone else better," one male replied, "People in the swinging community swing for a reason.
Since the late 1980s, safe sex practices have become more common.
According to 2010 estimates by the Kinsey Institute "swinging is relatively uncommon in the United States".