It took decades for society to come to grips with the Copernican solar system, years to put together a complete quantum mechanical description of the atomic nucleus, and so we shouldn’t be surprised that sexologists are still grappling with the G-spot.

A German doctor named Ernst Grafenberg first announced this female erogenous/orgasmic zone in 1950, and some people are still looking for it.

A few doctors have argued this spot lacks any of the special mythological powers attributed to it – it’s like the Bermuda Triangle of female anatomy.

But over the last 30 years, Rutgers University sex researcher Beverly Whipple has been gathering scientific evidence for the G-spot’s erotic potential. She cowrote the 1980s best-seller The G Spot, reissued by Dell last year.

Whipple says the spot can be felt through the wall of the vagina toward the front of the body. For the details, she referred me to her papers. From what I could gather, she seemed to be saying that you’re not looking for a special patch on the vaginal wall – you’re trying to feel through the wall for something in the next room over.

Apparently you’re after something three-dimensional that feels like a "spongy bean" and consists of glands that surround your urethra and would have become a prostate had you been a boy.

So the G-spot is really just a portal to this other glandular universe.

By studying women in the laboratory, she said, she has found that for some, stimulating this area creates its own kind of orgasm with a unique configuration of internal contractions.

And touching the G-spot can make the glands swell up and induce women to ejaculate a clear fluid, which Whipple has analyzed. She found it’s not urine and has some common ingredients with semen.

It’s nice that she’s found clinical evidence for a G-spot in some women, but why, I asked, can’t all women get their G-spots to work? Do we all even have a G-spot?

To this, the professor grew exasperated and said they didn’t know how many women have or didn’t have one. There’s no percentage breakdown. She said her goal is to validate the experience of women whose G-spots gave them orgasmic pleasure.

"We should not set up orgasm from G-spot stimulation as a goal every couple should achieve," she said, adding that not everyone likes the same thing.

If it isn’t her job to help those with recalcitrant G-spots, then whose is it? Suddenly I realized I knew who had the answer.

It was two or three years ago, I ran into the guy at the gym, of all places. It was at the pectoral fly machine. He looked about 35, with thick, longish hair and a nice face.

The conversation turned to the writing of books, because at the time I thought I wanted to write one. He said he was already a published author. What was his book about? He said I didn’t want to know.

But I did. After some coaxing, he said the book was about how to make women ejaculate during sex.

A long and awkward silence ensued.

The book is called The Secrets of Sensual Lovemaking: The Ultimate in Female Ecstasy, published by Signet. The author proposes in it that all women can have ejaculatory G-spot orgasms – and that this is really fun.

All you need is a lover armed with the "secrets."

It’s hard to say whether our local Casanova studied a statistically significant sample in order to get such a high G-spot hit rate. On the other hand, maybe some G-spots shrink up upon laboratory probing but respond well to cute guys.

I never saw him again. A Google search shows he hasn’t published any more sex secrets and has taken up dragon boating. Still, it’s nice to know so much work on female sexuality has gone on in the Philadelphia region. If there’s ever a survey of best cities for finding your G-spot, we should win.

More here.