That’s according to dating website Victoria Milan, which conducted the revealing survey among more than 4300 of its female members.

Of course, the agency caters mainly for married and attached people who are looking to discreetly cheat – so you’d hardly expect its members to extol the virtues of doing it thrice-yearly with their long-term partners with the lights off and their pyjamas on.

Of those questioned, a lusty 81 per cent claimed to have a fanciful imagination about sex – those love swings look interesting, don’t they? – but a puritanical 19 per cent preferred a more mundane approach.

A naughty 20 per cent of those surveyed fantasised about getting it on with people in positions of power at work, such as colleagues or superiors. An even naughtier 14 per cent fancy tasting the forbidden fruit of a liaison with one of their partner’s friends. And, believe it or not, 13 per cent dream of getting into some unusual positions with their yoga teacher.

A wistful 10 per cent still fantasise about their ex, while 10 per cent favour nooky with a neighbour and 9 per cent are hooked by the idea of hot action with another woman. Another 9 per cent favour giving their local pub barman some pump action, while 7 per cent are keen to dabble with their doctor and 4 per cent ponder being probed by their physiotherapist. Just three per cent dally with the notion of bonking their brother-in-law – which is probably just as well.

Victora Milan boss Sigurd Vedal said: “We see the naughty side to the British ladies, fantasising about colleagues and superiors, untouchables such as their partner’s friends, or with someone more mystical such as their yoga teacher.”

He added: “It’s healthy and normal to explore these thoughts, so long as you also consider the consequences should you decide to act on them.”

Wise words, Sigurd….wise words…