Historically, there is some doubt about when swinging started because now you have the best swinger websites available, but in the past, they did not have internet. One of the most accepted hypotheses is that its origin goes back between the forties and sixties in the United States. If before these practices were hidden and people weren't open about doing it, people became more relaxed over time and swinging has become something ordinary. Even if it is not something ok for everyone, and not in all countries, some couples meet on swinger dating sites and do what they consider best for them.