Genetic or just copied?

As long as I can remember I've had a habit of wiggling my toes constantly. Whenever I'm watchin' TV or calming down I have to move them constantly. The funniest thing about it is, that my father, my grandma, my sister and my brother wiggle their toes the same way like I do. Same pattern!!! So my question is: can this be genetic/hereditary? Or have I copied it when I was a little child?