More than three dozen states have approved medical cannabis over the last 20 years. We are fast approaching four dozen. Guess what the number one reason for using medical cannabis is? Chronic pain. Personally, that does not surprise me. Marijuana looks really good when you just want the pain to stop. I have experienced chronic pain for the better part of 40 decades. Fortunately, it is not devastating. I can manage just fine with aspirin and acetaminophen. My sister is not so fortunate. She has been dealing with debilitating back…