My wife Susan and I attended the 1990 National Conference of the Tourette Syndrome Association as delegates from Kansas City. This is where I first reallylearned about Tourette's, and myself.

It started with a slender brunette woman in a little black dress.

"I'm Jennifer," she said, kissing my cheek. "And I have to do this." Working quickly, she unbuttoned my shirt to my navel, then pressed her cold hand flat against my chest.

A lot goes through your mind when a beautiful stranger suddenly starts unbuttoning your shirt. In a way, yes, it was sexy. But it was more sad. Her hands said one thing; her eyes quite another. I smiled nervously and looked around for my wife.

"This is embarrassing," Jennifer said, pulling my shirttail out of my trousers as if trying to start a pull-cord lawn mower. "Please understand, it's just what I do."
I saw proof that there were others like me in the world -- otherwise normal people whose bodies did things beyond their control.
You ... molest people? I thought.
"I can't help it," she said in a small voice. "I just can't help it."

I knew that. None of the people I met that day could help it. Tourette syndrome is a tornado that rages through your body. It leaves a debris field of unwanted movements and bizarre behaviors. They crop up in the most amazing ways; in tics and twitches, outbursts and compulsions, and -- in the most extreme form -- in unendurable spasms.

With no more buttons to undo, Jennifer's long index finger traced a playful line down my right cheek, then dropped straight to my belt buckle. At one point her hand came dangerously close to heading straight down Broadway.

"Hell-o," I said, jumping back as if someone had dropped a firecracker at my feet. I wanted to be sensitive. I politely guided her hand away and excused myself.

"It was very nice meeting you ... I think I better find my wife."

That was one of the first things I really learned about Tourette's: You have to be ready for anything.

I flinched as a terrifying scream echoed through the room over my right shoulder. I'll never forget the sound. It genuinely sounded like someone had been stabbed. I turned toward the sound in time to see a middle-aged man with tufts of graying hair around his temples just finishing his yell. It came out of nowhere every few minutes thereafter as he spoke, a blast that seemed to come from the depths of a tortured soul. An articulate and well-informed speaker, he seemed particularly interested in history and foreign policy. When his symptom came he simply excused himself by holding his right index finger in the air in front of his mouth as if to say, "one second."

Then he turned his head and screamed this blood-curdling scream. Seconds later he resumed his talk, without explanation, exactly where he had left off.

Even though I had been diagnosed in 1984, it was here at the conference that I first saw proof that there were others like me in the world -- otherwise normal people whose bodies did things beyond their control. And it was on that night that I realized that Tourette syndrome was one of the most fascinating conditions I had ever seen. Sure, other conditions were more serious. Some of them were killers. But when it came to personality, they were pretty much one-trick ponies. Diabetes? Cancer? Compared to them Tourette's was the funhouse mirror of maladies. The same disease that made me shake my head and blink my eyes made Jennifer unbutton shirts and a middle-aged man scream like Janet Leigh in the shower? The word odd hardly did it justice.

Tourette's is believed to be caused by a chemical imbalance in the brain. In some cases, researchers think, it might be due to an abnormality in a certain chromosome that broke off and reattached itself backward. Estimates of how many suffer from the syndrome vary widely. Some experts claim that about 100,000 people in the U.S. have full-blown cases. Counting mild cases that likely go unreported, some say the number could be in the millions.

The variation in numbers mirrors the expansive variety of physical and vocal tics, odd behaviors, thoughts, and compulsions the disorder spawns. It may cause you to blink your eyes, blurt out swear words (the TV stereotype, which is actually a relatively rare manifestation), hop like a rabbit, have racing thoughts, or repeat the last word of a sentence endlessly -- endlessly, endlessly.