In this setting, on a day in November 1995, I was type-talking with a female postgraduate student bearing the fanciful online name of Cindi and a description to match. ("A 5-foot-10 green-eyed redhead with a runaway imagination and a fuzzy idea of the line between virtual and real. She runs five miles or so every morning to make sure all the pizza she eats doesn't take up residence. Her hair is short enough that her earrings can dangle when she walks.") She introduced me to one of her friends, a middle-aged chemistry professor recently promoted to a powerful administrative position at his private Connecticut university. "All his students love him!" she told me enthusiastically. His online name was Rhyys.

I was briefly involved online with both of them, but the relationship with Rhyys soon became intense. We were talk-typing online several times a day until Christmas Eve 1995, when, in a slow and emotional ritual, we each typed our real-life names. After that, there was no going back. I already knew by then he was a devout Catholic, that he had been married for 20 years, that he had one small child, born late in the marriage. Of course, I should have turned away, but I did not. Instead, I opened my heart and he walked straight in. I’d never met him, never even heard his voice on the phone, but he felt like my lover, my brother, my best friend and my colleague all rolled into one. I was especially struck by his thoughtfulness. For example, he stated the need for some kind of message system in case either of us was taken ill. And who would tell Cindi, he asked? Something had to be worked out. He promised to give it some thought. A few days later he was begging me to trust him: "Just stay loving me," he wrote. "I will try with all I have to not let you down. Don't be scared of crawling under my skin, I won't crush you," he promised.

Looking back on it now, it's hard to explain exactly why I took any of that romantic tosh as seriously as I did. And why did I connect with him so strongly in the first place? All the usual manifestations of attraction were there -- the faster heartbeat, the heightened sense of that one other person, the erotic intimacy -- and yet there were no bodies. Nor was there any chemical or physical interaction beyond those we imagined, invented or role-played. But the fact is, despite the lack of all those usual signals, I fell for him long before I even heard his voice on the phone. I suppose I formed an idea of him through the "tone" of his voice -- the words he typed and the stylistic nuances of his phrases, plus a sense of his personality conveyed by what he actually said in those phrases. Our huge ability to imagine combines with an intense desire to find perfection and creates, as we say in England, a silk purse out of a sow's ear. But that moment of free fall in the weightlessness of anonymity can lead to a very painful crash to earth when you discover that the person you fell for was only exciting because you imagined him/her to be so.

It's reminiscent of the famous experiment of biofeedback suits, when a couple (he in Paris and she in New York) were hooked up remotely with the intention that they would arouse each other via remote touching and mutual feedback. It seemed to work very well, to be enjoyable for both, and it was only later discovered that in fact the connection had failed right at the start and they never had been connected at all. In other words, they had been arousing not each other but themselves! In my case, my lover's clichéd phrases of love and passion created a facsimile of emotion that was as effective as the real thing, and the fact that they had never been connected to the truth was something it took me a while to discover.

In July 1996, nine months after we first met online, he flew to England to meet me, and we fell instantly in love. That summer, I also went to his hometown in New England. But in September, he made an astounding confession: Not only had he been posing as a woman online all the time he had known me, but that woman was Cindi! While I was not shocked by the gender-bending (that is part of everyday life in cyberspace), I was very shocked by the lie. But I was in love with him, and I was used to Internet life, where people often try out new identities. And after all, I was writing a book about the subject. How could I really object to this new revelation? I was so steeped in the mysteries of the Web that my ardor overrode my caution, and I saw his duality not as deceit but as a marvelous bonus: two lovers for the price of one. He deleted Cindi from LambdaMOO, but her memory remained strong, especially when we met in real life and I stared into his pale eyes to see her looking back at me. We had always played around with gender boundaries, and Cindi's continued ghostly presence made everything somehow even more complete as we grew closer and closer. She was still part of us.

The powerful effect that Rhyys had on me was his apparent presence in my previous books. In my first novel, "Correspondence," a woman is transformed into a software virus permeating her cyborg lover's body. In my second, "Water," the main character imagines a man into existence with the power of her desire. In another, the characters are attracted to each other purely by the power of words, just like the text interface of MOOs where words are all you are. Thus, I felt that I had written this man several times already, and now here he was manifested in the sometimes-virtual, sometimes-real flesh.

My new novel turned into a mixture of invented and real online experience. Rhyys (not, of course, his real name) and I were leading a heady life, logged on for hours every night, type-talking endlessly, exchanging histories, exchanging intimacies. We experimented with programming new environments and other personas. I recorded our often bizarre interactions, writing them into my book, and if they sometimes seemed pretty strange, they were real for us even if nobody else would ever believe them. We exchanged genders. We invented new genders. We created virtual cyborg bodies and played in them. We built laboratories, caves and whole sequences of rooms, all programmed into the ever-changing textual interface of a MOO. By now, I was absorbed and obsessed by him: his imagination, his eroticism, his intensity. When we were together in the flesh and I looked into his face, I could see it shifting from male to female, from softness to hardness, from dream to reality. I could not get enough of him. He had become my only muse. I dedicated my novel to "My Beloved Technician." I wanted to be with him and write about him forever.

Next: It finally fell to me to burst the bubble.

Private Life Romance, relationships, and the personal side of Table Talk