A few years ago I bought a cheap bathing suit because I was going on vacation and you should have a bathing suit when you go to a resort. But I never wore it.
Now, I'm conquering my fear of water and going to the pool every day. Last week I started noticing that there was an unusual number of small black flies in the water, but I was the only one who noticed. This went on for a few days until I noticed that my cheap suit was wearing out. There weren't a lot of small black flies in the water, there were a lot of small black threads from my suit.
I went out and bought a new, more expensive suit and, surprise, no more small black flies floating around me.