That's funny.
I have music in my head nearly 100% of the time. My youngest does too. She has earbuds in most of the time. I once asked her why she was always listening to music. Her response: "That way I can control the volume."
I have music playing a large percent of the time too. My reason is that I can control the content.
There is something so very rude about forcing your music on someone though. I can't imagine playing music in an nature based setting. I envy those who can have a quiet brain. Why would I ruin that for them?