Most Helpful Girl
That does not happen accidentally. If they are doing that they are trying to break the touch barrier and communicate that they are comfortable with you doing the same thing. Once when I ended up in the car next to a guy I liked...I rested my head on his shoulder and complained that I was tired.
It is a way that we try and figure out if they are receptive to the touch as well. If they don't push you off or away then it is a pretty good sign.