People all have a kind of "feedback consciousness," meaning they interpret what they need to do in their minds first, then perform the corresponding action, and receive feedback from the contact of their limbs, from which they simulate the next action, resulting in a set of coherent actions... This might sound complicated, but the mind can complete it in an instant, so fast that one hardly realizes they have thought through so much... For example, when going downstairs, you first see the step in front of you, then step forward, your brain automatically calculates the time your shoe will contact the step, and in that instant, contracts your muscles to cushion the impact, while also moving your other foot forward.
This whole process is completed subconsciously, so you don't have to think about it deliberately; in other words, you can't deliberately stop this behavior.
