Mirror touch synesthesia

Hi 

I recently came across someone describing mirror touch synesthesia. I didn't realise this was a difference until then I thought everyone had this......I thought this was one of my human traits as opposed to one of my autistic ones.....but apparently not. To clarify if I observe another person being touched then I experience the touch myself. I don't experience it how they do, I experience it like I would......so if they perhaps are touched lightly on the arm I will feel a painful sensation on my arm. If they are hugged tightly I will feel this all consuming sensation that literally shuts everything down for me. I can't move, talk basically anything apart from state at them until it is finished. Just wondering if anyone else can relate to this?