Is 14 too old for a babysitter?

My mother got me a baby sitter once when I was 13 years old and on vacation with family and friends. It was a day when the adults and older teens went out to do something and I would've been alone in a vacation house (in the middle of Palm Springs, a crime free upper class area, in the relatively crime free 1950s). My mother hired an 18 year old girl to supervise me. She was a very nice girl and we both made the best if it. But I remember how deeply humiliated I felt. Of course, with my mother, that may have been the whole point.