I mean, if you're on a train or somewhere else sedentary, I can't just relax and daydream/listen to music. I've ALWAYS got to do something stimulating, like play chess or other games on my phone. Or read (and never junk like magazines/fiction...stuff like science or philosophy), write, etc.
Every time I try to relax, I end up doing math calculations in my head, or thinking up mechanical inventions, rotating/inverting 3D objects in my mind, etc. Kind of defeats the purpose!
If I don't, I feel like my mind is dying. But yet I suppose it's relaxing.
Do you SPs ever get that too? Or do you have the ability to just LET yourselves relax mentally?