I used to rip/rub my clothes - absolutely loved the texture of the hems of a ripped up pair of jeans. It’s socially a little odd to keep a piece of denim in your pocket to fidget with.
But my beard? Always with me. Accessible 24/7. The texture is always changing and interesting. Stroking my beard makes me look like a smart person thinking about things. A+++
When I was a girl, earrings were fun. Could spin them around, and the backs were interesting.