Originally Posted by
Alric
He is right, its a symptom of Obsessive/Compulsive Disorder. I had the same thing, and I actually looked into it before and I think I probably suffer from a very mild case of obsessive compulsive disorder, though it was never medically diagnosed(like I said a very mild case).
The thoughts really don't mean anything at all. I would say you don't have to worry about acting on them, because you will never act on them, but worrying about it is also part of the disorder.
If its not effecting your life, you do not need to take any kind of medication or really even worry about it. Its only when it becomes a serious problem and starts interfering in your normal life that you need to worry.