I got my ears pierced when I was 53, teaching in Ft. Worth and was simply told that now I couldn't say anything to my son if he wanted to get his pierced as well. My second set of holes came about 4 years later when I was teaching at another high school in Dallas County; no one said anything this time. There goes the excuse about being too old. Just say that you had a mid-life crisis and really wanted to be different from all the other senior citizens.
