Swinging, also known as “partner trading” or “lover trading,” try a low-monogamous practice in which both men and women and you will lovers when you look at the committed matchmaking participate inside consensual sexual circumstances with others due to the fact a leisurely or social craft. This new root regarding swinging will likely be tracked returning to new later 1950s and you will early sixties in the usa, where it had been first in the army people that would swap couples to deal with the fresh new worries regarding breakup through the wartime.