Well, this is a very rare subject, I haven't seen many people who have the same condition as me.
http://www.biology-online.org/biology-forum/about18829.html
What is it all about?
Well, if I'm sitting in a quiet room and or environment and I hear certain sounds (for example, someone rustling paper, turning pages of a book, moving things around, typing on a keyboard, etc) I start to get this strange tingly feeling on my back/shoulders, I then start to relax. The sensation then begins to move throughout the body, in particular the head where my hair feels like it is rising or standing on end. It is like a euphoric state, almost (although without having tried any) taking a drug that gives a lovely sensation. It almost paralyzes me, not to the point were I cannot move, but because the sensation is so relaxing and good feeling that I don't want it to stop. If I move or a louder more aggressive sound interrupts the sensation disappears. It is like some sort of inner massage of the nervous system.
I would like to know if anyone on here has the same condition. It is completely different to any other relaxation method I have ever known and only seems to work if someone else is creating the sound/movement.