Tubby's favorite experiment is on Peanut, not a human, but is of the same general theory so here goes.

How many licks does it take to get to the center of a Tootsie pop....eerrr...oops, almost. How 'bout this one. How many licks does it take before Peanut hawls off and swats me one? And along the same line, how many times must Peanut swat me before the humans step in and yell at me to leave her alone?