Rhythm is part of the addiction and desire for repetition.

This is known as meter or timing. Drummers used to have to be good at it, to lay down a foundation the rest of us could follow. Ended up doing it myself most times.

The human heart beat is the cliche metaphor to explain the need to drum.

When a drummer lags, the world is put on hold, but like the locomotive with momentum eventually you cross that bar.