I have long hair which is definitely a useful fidget toy, I don’t think I’d know what to do with my hands if I cut it short now. At the moment I can hold on to the end of my ponytail behind my back. pull it forward to tuck under my chin, or tie it into literal knots. Being able to run my hands over my head and go mmm, velvet… just doesn’t seem as versatile. Probably looks less silly though.