Used to just write weird little thought fragments on all of my stuff rather than bands or football teams or whatever. Did it to my first guitar too, which I still have and which still bears some bits of 14-year-old me’s graffiti.
Also bought what I thought was a really cool backpack in France one summer holidays only to find out that it was apparently a girls’ riding backpack, and my parents wouldn’t replace it because why would you replace a perfectly good bag?