Editing Swinging (sexual practice) (section)

=== Relationship quality ===
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 reported happiness is higher in their relationships than the norm-reported happiness.<ref name="case_for_swingers" />
Some believe sexual attraction is part of human nature and should be openly enjoyed by a committed or married couple. An analysis of multiple studies showed 37% of husbands and 29% of wives admitted at least one extramarital affair.<ref name="Reinisch, Beasley, Kent, & Kinsey Institute 1990">{{cite book |last=Reinisch |first=June Machover |author-link=June Reinisch |last2=Beasley |first2=Ruth |last3=Kent |first3=Debra |author4=Kinsey Institute for Research in Sex, Gender, and Reproduction |author4-link=Kinsey Institute |title=The Kinsey Institute New Report on Sex: What You Must Know to be Sexually Literate |publisher=St. Martin's Press |publication-place=New York |year=1990 |isbn=978-0-312-05268-3 |oclc=645832116|page=[https://archive.org/details/kinseyinstituten00rein_0/page/72/mode/2up 73]}}</ref>