There's a Kickstarter campaign for wireless earbuds that conform to your unique ear shape

Ears are like fingerprints: no two are exactly the same.

It's a perennial problem with earbuds—they never fit your ears quite right so they either fall out while you're running around or they start to hurt after wearing them for an extended period of time. Sometimes it's both if you buy those $5 ones in the CVS checkout line. Even high-quality, expensive earbuds seem to operate on a one-size-fits-all mentality. *cough AirPods cough*