I get really bad dull pains in my upper-neck, and the lower part of the back of my head. I always thought they were due to drinking too much caffeine, as I'm a very heavy caffeine consumer. It sucks you have to go through that as marijuana as known for its ability to reduce pain. I was going to suggest maybe it's just stress, but I have known others to suffer from symptoms most other users don't get.

About old stoner guys. I was always known as the stoner in whatever group I happened to be roaming in, and a friend and I caught another friend's dad crouched in his closet sneaking a few hits and blowing them out into a sock or something. He turns to me and is like I didn't know YOU were here with a big smile on his face. Never knew he smoked. Middle-class ex-hippies are all over.