Attitudes to casual sex range from conservative and religious views, the extreme of which may result in imprisonment or even capital punishment for sexual relations outside heterosexual marriage, to liberal or libertarian views, the extreme of which is free love.
During the sexual revolution in the United States and Europe in the 1960s and 1970s, social attitudes to sexual issues underwent considerable changes.
Swingers in the lifestyle engage in casual sex with others for a variety of reasons.
For many, an advantage is the increased quality, quantity and frequency of sex.
Some swingers engage in casual sex to add variety into their otherwise conventional sex lives or for curiosity.
Swingers who engage in casual sex maintain that sex among swingers is often more frank and deliberative and therefore more honest than infidelity.
Some couples see swinging as a healthy outlet and means to strengthen their relationship.
Others regard such activities as merely social and recreational interaction with others.
Swinging can take place in various contexts, ranging from a spontaneous sexual activity at an informal social gathering of friends to a regular social gathering in a sex club (or swinger club), private residence, or other pre-arranged location such as a hotel, a resort, or a cruise ship.
A study of hooking up at the University of Iowa found that waiting to have sex doesn't contribute to a stronger future relationship.
Instead, they found that what mattered most was the goal individuals had going into a relationship.