Does anyone else hear music all day long... without any actually playing?

I don't hear actual music playing all day, but I can hear music in my head like you. I can Focus on certain parts of the song, and get details and I can also change them if I want. Like if I play it in my head I'll change guitar solos or drumb beats. And if I feel like i will actually physically make beats with the song with my teeth, and sometimes hummin along with it. Maybe it's odd, but it helps playin guitar, and can help time pass.