We open so many doors in a normal day, the motion is automatic. The only difficulty we may have is knowing whether to push or pull a door open, or if the door is too “heavy.”
Of course most people’s experience is using their hand to open doors. More and more, people don’t want to touch a public door handle with their hands, especially restroom doors. So that habit has been altered for many. Some grab the door handle with a paper towel. If paper towels aren’t available, a shirt sleeve may be used.
The automatic motion of opening a door with hands is also disrupted when a person is carrying items and can’t easily grab the door handle.