Early researchers found that externally administered drugs like morphine worked by docking into receptor cells located in the brain and spinal column. While the drug molecules are docked, pain signals can't use the docks, so the flow of pain is blocked.
But why would such cells exist in the first place? Surely not to dock external drugs. The answer is that they are part of a system designed to decrease pain and foster reward, a powerful evolutionary twofer that dishes out rewards using internally generated drugs called endorphins, chemicals that facilitate signals between neurons. This reward system ensures that we do important things like exercise, compete and, of course, learn golf.
Your limbic system is the seat of the emotions and it is wired to the prefrontal cortex by neural loops. The limbic region is seeded with many endorphin docking cells, ensuring that you are rewarded for competing and exercising as well as learning. Thus, in a roundabout way, you could argue that you are designed by evolution to learn, exercise and compete, aka, play golf.
Remember this when things get rocky on the golf course. Regardless of your score, just keep telling yourself, "I'm a natural."