Answer:
I can be as thin as a picture frame but my insides have many things you can see.
One strand dangles. Two strands twist. Three or more can fashion this.
Touch this and you'll regret it. But if it's cold, you won't forget it. What is it?
I go around in circles, But always straight ahead Never complain, No matter where I am led.
Tear one off and scratch my head, what once was red is black instead!
I have thirteen hearts but no body or soul. What am I?