Has anyone tried "bone conduction" headphones?
They work by making tiny vibrations to your cheek bones and skull bypassing outer and middle ear. I´m curious, because I don't like to put anything in my ear. There are some models in Amazon.

https://www.amazon.com/Aftershokz-AS600IG-Titanium-Conduction-Headphones/dp/B018XNGPD6