Once, my friend and I were walking down a busy street in Madrid on a Sunday afternoon. Suddenly, we heard somebody who was walking behind us call out, "Girls! Hey, girls! Wait up for us! Don't run away." We turned around and saw two gentlemen in their 80ies wave at us in a flirty way. With a sense of righteous indignation at these much older men who dressed in their Sunday best and went out to chase young women (we were in our twenties then), we turned around and saw two very old ladies who were waving back at their "boys" and giggling.
My friend and I felt very ashamed of our presumptuousness.