Speaking as a veteran of the past war, I do like to use "medication," when my knee is acting up. Sometimes, the cold, or stepping wrong can make my knee hurt so bad that my leg feels like it should be cut off. That being said, I am not always able to get proper pain killers from the doctors. Weed can help me forget about my leg for a couple of hours at least. While I'm sitting there not really being able to move, masturbating also takes my head off the pain as well. Do what you want to do as long as it doesn't hurt other people.