Diabetes has given me thick skin!
I had a nerve test done over winter break on my arm to figure out if I had CTS (and it turned out I had Pronator Syndrome instead!) and the doctor stuck a big ol' needle in my arm over and over (and over...and over...). He said, "Have you been diabetic for a long time? I can tell...your skin is like puncturing a grapefruit. Most people are like tangerines."