I also have poor balance so holding on helps. Basically I have no idea where parts of my body are. I think this might also affect my ability to tell when I'm sick. I can't feel where I feel pain when I do. I just know I feel lousy.
Emotions play a part in the sensory system.
Each of my senses works well at times, but emotions prevent them from working sometimes. Basically emotions mess up my sensory systems. I am able to function as well as I do only by controlling my emotions. When they get out of control some sensory systems will fail. They sometimes will fail when I am not dealing with emotions, but I can count on them to fail when I am attacked by emotions.