So many things used to come with cheap earbuds or headphones. A pocket radio. A portable CD player. A cheap MP3 player. A laptop. I've even had some small TVs come with headphones out of the box. So there's like 40+ sets I didn't even ask for over the years. Pretty much all immediate trash.

Then there are the ones I bought in a pinch. Go on a trip, realize I didn't bring my headphones, swing by the store and get a cheap pair. Being a cheap pair, they often didn't last long. There's another dozen sets.

Now the ones I actually wanted. Not all have replaceable cups or pads, so they'd often wear out after a few years. Or they were USB, and the circuitry started freaking out after a few years. On top of that I probably have different sets for different use cases. A pair for on the go. A pair for the computer. A pair for the HiFi system. A pair for the office.