Is it normal to scratch my thumbs?
I've had this for years. I love scratching the outer parts of my thumbs. I first started with the right one, then with the left one. I scratch them mainly with two teeth of the zipper set apart and ribbing my thumbs against them. When I scratch my left thumb I feel some kind of tickle under my skin, just below my neck. I love that feeling. I cannot always feel it but when I do, it feels amazing. I just wanna know if there are other people like me.