I've had it as long as I can remember. Like you, I thought it was normal. When I was a little kid I thought that was what the Simon & Garfunkel song "The Sound of Silence" was talking about. Since I suspect I've had it since birth, it doesn't bother me. It's just something that is. I feel bad for the folks who get it later in life and have trouble with it. My neighbor got it a few years ago and it keeps him up at night sometimes.