THE rich, redheads and the well-educated are most likely to have sex with their partners out of obligation rather than desire, a study revealed today.

More than six out of ten (61%) of those surveyed admitted submitting to sex even though they weren't in the mood, with a surprising 58% of men ready to satisfy their partners.

Bexley emerged as the town most eager to please with 83 percent prepared to have obligation sex.

But just 34 percent of Wolverhampton residents would pleasure their partners just for the sake of it.

The survey of 20,000 showed Virgo was the starsign most likely to keep their spouses happy.

A spokesman for dating website makefriendsonline.com said the results revealed that people may not be as sexually liberated as was previously believed.

He said: "Sex may no longer be taboo but has sexual freedom altered our basic attitudes and expectations?

"Some women responding to the survey said 'sometimes it's just easier to do it than explain why not' while another thought that 'saying no might hurt their feelings'.

"One man said that it was 'one of the services you’ve agreed to provide'."

The spokesman added: "These figures also suggest there are many occasions when both partners are making love out of a misguided sense of obligation – maybe a little communication would save them both the trouble.

"Most worrying of all however is the implication that the majority of love making takes place when at least one partner would rather be doing something else.

"Sexual Liberation may have given us the freedom to say yes but it would seem we’re still lacking the freedom to say no."