Perhaps many are not aware that some people, for whatever reasons, do not like to be touched by others, even if there is no especial intent - just being friendly or grabbing their attention, for example. I found this out once and later discovered that the person was in fact autistic (which I had not worked out at the time), but I've since discovered that it occurs also in various other issues, like Asperger's or OCD, and it might be a phobia on its own (haphephobia). Anyone have such or had problems with it?
Don’t Touch Me! A Guide to Understanding Touch Aversion & Tactile Sensitivity
(I hope the choice of music isn't offensive - not intended as such.)