The Stimming Checklist currently has a list of 1441 different types of stims that people perform. I use a lot of them. Not only autistic / aspergian people stim. As you see from the list, all you have to do is look around and you will see that just about every person you meet stims in one way or another.
Is it OK to stim? Of course, it is. If some person out there is trying to tell you that it is not, then phooey to them. Stimtastic has pretty great links to how you can skim and why it is OK to stim. I recommend that you read what she has to say.
HAVE FUN STIMMING!