It's not easy to get your arm under the arm rest, you have to move your body very far away from the target to the other arm rest, then get your hand under it. Last time I touched a lady's leg long time, cos she covered her legs with a big coat, so I could get my hand under. If she didn't have the coat, she could easily see my hand. However, my other hand touched an old lady's leg on the other side by accident, and she punched me in the chest......this was unexpected......