The manual was in the collection of the late book dealer Tony Hattersley, and goes under the hammer at Bonhams in Oxford on September 11.The auctioneers' book specialist Matthew Haley expects it to fetch about £2,000.But in Restoration times, it was apparently the fastest route to a lady's heart.

The answer is apparently women, "for men being of a better temper, are dryer and stronger".

He says it is wrong to sleep on your back because "it causes deafness, disturbs the fore-part of the brain, and procures the night-mare" and adds that amorous women are more ticklish than others "because their skins are more loose, soft and delicate".

The Oxford English Dictionary has no entry for squinath, but lists squinanth as a kind of rush, whose flowers were used for medicinal purposes.

Those wishing to target particular flabby or sagging areas had more of challenge.

An edition of a rare 1694 manual, The Ladies' Dictionary: being a General Entertainment for the Fair Sex, is going up for auction next month.

It reveals the bizarre, and often hilarious, home remedies and etiquette tips offered to women during the reign of William and Mary.

Toni Stevens, 33, from Torquay, exchanged sexual messages with who he believed were 14-year-old girls in internet chat rooms but in reality he was dealing with a group of paedophile hunters.

They posed as under-aged girls and responded to his online grooming, in which he sent images of his erect penis and suggested having threesomes with his adult girlfriend.

For variation, readers could try complimenting a woman's neck, saying "Her neck is polisht Ivory, white as the silver Dove." The guide, like the 1694 Ladies' Dictionary, was owned by the late book dealer Tony Hattersley and is up for sale at the same Bonhams auction in September.

In it, Gough also rules on which sex is more inclined to pleasure.

Described as the Cosmopolitan magazine of its day, its pages include pointers on dating, make-up, diet and expanding the mind.