Thanks for bringing back a memory of my father. My father was an uneducated man, but he was proud of what he had, muscles; he worked as a plumber and was known to carry bathtubs up several flights of stairs. When i was quite young I watched for the first time him giving himself a B12 shot. He made a huge muscle (bicep) and then stuck himself with the needle. What a spectacle. I will never know whether he actually needed them or not, but I know he got some strange pleasure from administering the shot into his own arm; especially with an audience of wide eyed kids.