I used to have problems with back pats because it's a customary hick thing to slap people on the back and I got too used to it
apparently getting patted on the back is a sign of acceptance in the real world
I was at work a couple months ago and one of my managers stopped and looked over my shoulder while I was scrubbing a cooler. She asked me if her standing there was making me uncomfortable. I told her no and said she could stand there as long as she wanted. She then moved closer saying, "How about now?" Nope, still good. Then she grabbed my arm with one hand and wrapped her other around my back and other arm. My hair stood on end and I started to jerk away without even thinking about it. She was just like, "Well I guess than answers that!"