i tap my foot/feet to keep the rest of me from jumping off the chair....if the tapper isn't dancing way deep down inside, if she's sitting all still and proper in the back and the neck and the shoulders and the knees....then the foot ain't gonna keep the right time, and there ain't no purpose to it.

i think one could learn how to tap a foot, and perhaps the best way is to try to do it when just listening to some music, then just when singing, rather than as a means of trying to keep the beat straight when playing an instrument. that would be the advanced level of foot~tapping.

~'nut