Newton's third law of motion states that for every action, there is an equal and opposite reaction. While this law applies to the forces between interacting objects, it does not necessarily mean that the experience of pain or sensation will be the same for both parties involved.
The perception of pain is a complex phenomenon that involves not only the forces exerted but also various factors such as individual sensitivity, pain thresholds, psychological factors, and even the area of the body affected.
When you hit someone, the force you apply is indeed transmitted back to you with an equal magnitude but in the opposite direction. However, the specific sensation and pain experienced by each person can vary due to a multitude of factors, including differences in body composition, nerve sensitivity, and pain tolerance. Additionally, the area of the body that is struck may also affect the experience of pain. For example, hitting someone in a sensitive area like the face or groin may cause more pain compared to striking a less sensitive area like the arm or leg.
It's important to recognize that pain is a subjective experience and can vary greatly among individuals. Newton's third law explains the equal and opposite reaction in terms of the forces involved, but it does not directly account for the subjective experience of pain.