My husband and I are no exception. I may not notice all the things we do, but I am aware of a few.
I am going to show you a few hand gestures that I do towards my husband. These are usually done when passing each other in a room or sitting in the car when we/I am not interested in conversation but want to acknowledge his presence if we make eye contact. Like when he is playing a video game and I'm just passing by. Does that make sense? I don't know why these are so violent :)