Addict Mistake

I was on the porch while my friend Sam spoke with our friend Tristan. I must have not said anything to indicate that I was friends with both of them, because the moment they walked away, another guy outside turned to his friend and said, "Oh my god, did you see that guy's track marks?" Sam's arms were shot up and down with scars from syringes. I told the guy that Sam donates plasma for $30 about twice a week, and his track marks are actually not from being a heroin addict. I told Sam about the funny exchange and he was thrilled. That was about five years, and Sam works in the music business now. I bet people make the same mistake in his line of work every day.