More than half of Britons have had a one night stand, according to a survey of sexual attitudes and behaviour.
And 60% of those questioned for a poll believe prostitution should be legalised.
But almost a quarter of respondents to the survey of more than 1,000 Britons said gay sex should be made illegal.
One in three Scots in a long-term relationship admitted to having had at least one affair, according to the survey published in the Observer newspaper.
And the Welsh were found to have had an above average number of sexual partners at 13 - rather than the UK average of 10.
Sexual health
Londoners were the most faithful with only 7% having cheated on their partner.
Almost one in three Scots said they would sleep their way to promotion or a pay rise - the average across the UK was 18%.
The findings from the Observer/ICM poll used a confidential questionnaire in August.
A total of 1,027 people aged 16 and above were questioned confidentially about they viewed sex in the 21st century for the Observer/ICM poll.
When asked about sexual health, nearly a third admitted they did not practise safe sex with a new partner.
The same was true for 31% who had been tested for HIV.
Robert Yates, editor of the Observer special magazine supplement Sex Uncovered, said: "They [findings] reveal a population with complex and changing attitudes to all aspects of their sex lives".
He said the poll was taken at a time when British culture has arguably been at its most liberal and tolerant towards sex.
"Whether this has led to greater freedom for individuals, or to a growth in anxiety about their own sex lives, is something that this supplement aims to uncover."
The full results of the poll are published in The Observer.
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The practice of putting women on pedestals began to die out when it was discovered that they could give orders better from there.~ Betty Grable
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