My friends when I was in high school would do the same thing, I hated it. I didn't find it funny at all and it made me so uncomfortable. I didn't tell them I had autism, but they knew I had oddities. I couldn't look people in the eyes so they would stare at me and try to look directly into my eyes. They would hug me, touch me, etc and it was the worst. Now we are in college and they have stopped being that way, but they hug me as a friendly gesture. I have learn to tolerate hand shakes, hugs from certain people, and some other social things. I still have a hard time determining how long I should keep eye contact; I make myself have eye contact to be socially acceptable.