One time I had this aux cord, I don't remember where I got it, I think I randomly found it because I was kind of a packrat in my childhood. But like, I thought it was nifty af cuz it was a headphone jack to headphone jack and I was certain I was gonna have a use for it someday. My sister eventually got some speaker system when she was in like eighth grade, and I was so interested in it cuz it had a headphone jack on it, and I was like, would this work with an ipod? So naturally while my sister and my dad were setting it up, I like brought it in with excitement, like, "can we try this?" And my dad ****ing screamed at me and accused me of stealing it from the box and I couldn't even explain that I had it for years because he just wouldn't listen, he just took it from me and I cried and I never got to see if it worked. I still think about that story every now and then, and while it's not "lost" in a more literal sense, I still never have seen it since and my dad is such a turd. The speaker system never came with an aux cord; that was mine.
The other story I can think of also relates to my ipod though. For awhile before I got a real case for my ipod, I would use these official Apple products called "ipod socks" and they're literally just a sock you put your ipod in and it covers the screen and stuff so it just like protects it while you're listening to it. Which was pretty acceptable back then because you really only had ipods for music, you didnt need to actively be playing with them to use them with the exception of maybe adjusting volume. I had this blue sock that I loved cuz it matched my ipod, used it through middle school and partway through high school, and one rainy day while waiting for the school bus, I lost my sock.
I was really sad about it cuz while I had some other socks, I liked that blue one. But fortunately, I found it the next day under the tree I stand under while waiting for the bus. It was dirty and soaked and i had to clean it but I was so happy it was still there, cuz my ipod was really old and they didn't make socks anymore.