I don't really want physical contact with anybody I'm not sexually attracted to, but it's a part of life (except for hugs, I like hugs).

I don't particularly enjoy when my grandma initiates a ton of physical contact with me, but I know she needs closeness and that's how she shows affection so I put up with it.

Random aquintances who think they're way closer to me than they are touching my shoulder or patting me on the back is just intrusive and a crossing of social boundries. Its annoying, but try to understand it's the way some people communicate though and a lot of people are unaware of social boundaries, but you can't react to that.