What is it?
For many women, it's a highly sensitive, highly erotic area that provides hours of pleasure. For others it's a knobbly bit that, when touched too much, creates an overwhelming sensation of needing a wee. Some women can't feel any sensation at all while others don't seem to have one at all.

The films taken by Masters and Johnson, their papers, their figures recording breathing rates, blood pressure, heart beat, vaginal lubrication and other physical responses had convinced almost everyone they were right, it does exist.

But At the end of the 1980 conference, gynaecologist Dr Martin Weisberg of Thomas Jefferson University Hospital in Philadelphia said the new information was "bull."

"I spend half my waking hours examining, cutting apart, putting together, removing, or rearranging female reproductive organs. There is no female prostate and women don't ejaculate," he said. Afterwards, Perry and Whipple produced a woman whose vagina was being stimulated manually by her partner so that Weisberg could examine her stimulated G spot. He changed his mind.

What to do with it
Once you've established whether you've got one or not, you need to discover whether you have one that gives you pleasure or just feels a bit annoying. Stroking is usually the most enjoyable form of stimulation.

Sexual virtuosos recommend inserting the forefinger to about the second knuckle and making a 'come here' motion towards the front vaginal wall. You'll need to experiment with pressure and length of stroke to find out what feels best for you. It's important that you're sexually aroused first, and also worth noting that many women say sensitivity varies throughout the month.

During stimulation, the first sensation might be the need to go to the loo, possibly because the G-spot is on the front wall so your bladder is being pushed. You can check this out by making sure your bladder's empty first then seeing how it feels. The first couple of times it might be a bit odd, but many women say a little perseverance is more than worth it.