Im 20 years old. I usually dont tell people about this. The person who know ive been rockin back and forth while im sitting down listen to music is my mom and my brother. Ive been having this problem every since i was between the age 7 or 8 years old. Every day and Every night i rock back and forth while im listen to music everyday. when it comes to music in my ears i started to rock back in forth. I just cant help that. My friend brother does that and so as my couisn.I was shock cause im glad that im not the one with the problems. I stay rockin back and forth everyday because of the muisc i listen too. I love listen to music. I dont do that when im travel somewhere else. Is it some kinda disorder or what? im not retarded. Im very smart person i just dont know why i rock back and forth all the time when it comes to music.