Punch them in the face
You can firmly but politely say, "Please stop touching me, it makes me uncomfortable." It's important to set clear boundaries and communicate your preferences assertively. If the behavior continues, don't hesitate to seek help or report it to someone in authority.
If you don't want the other person to touch you like that, tell him/her to stop. And if he/she doesn't stop, you have to tell an adult that someone is touching you in a way you don't like.
Knighting
Then your shawl is about the right size.
The shoulder blades are not both touching the mat as in a pin.
Stop touching it so it can heal.
Tell them Stop! and mean it
Tell him to stop or you should tell someone such as your parents or teacher as this is wrong.
The same way you stop touching anything else. make no physical contact.
a chip
Ask them politely.
The feeling someone else's touch is specific and can only be obtained by someone else touching you.