The first time I realized I was getting old was when I turned 40. I noticed that I looked at the young women, but they had stopped looking back.
The next tier was reached when I turned 50. I could look, and the young women just seemed annoyed. (Hey, little girl: if you're going to expose your butt, breasts, navel or other parts to the world, expect some stares).
Now, at 55, I'm already noticing that the young women treat me as harmless.
Next thing you know, they'll be sitting on benches in the park and tossing peanuts at me.