Nude psychotherapy is the use of non-sexual social nudity as an intentional means to improve the participant’s psychological health. The field began in the 1930s with psychological studies of the effects of social nudity on the lives of naturists. It developed in the 1960s along with the encounter group movement as a way to challenge preconceptions and promote intimacy and trust, but suffered a decline in the 1980s. It is still used by some organizations that offer participatory workshops on intimacy, sex and love.