One summer when we were kids, my little sister and I were playing when I noticed that her knees looked like little baby faces. Being the older brother, I of course teased her for a while then promptly forgot about the whole thing. Two weeks later we go to the pool and what do I see all around me? Baby face knees! Experience has taught me that about 1 in 5 people are afflicted by this.
And now that you’re aware, you’ll never not see it again.