If I touch my grandads arm I will sometimes (more when was younger) get a static shock, can't go to the library because I can't touch the bookcases or anything because it hurts my fingers. I was in town and everything I touched I got one, well everything metal. I was at school and we were using the Vanda graph generator and we took in turns first and it didn't affect me. We then linked hands and I was in the second group and when I watched the first group do it I didn't want to get shocked but when I did it I was at the end and it touched me (I assume) and went back along the line and everyone else felt it apart from me.
Is this normal? how can I stop it?