OKay, I had to Google it.
After this popular commercial, Purdue University, the University of Michigan, and Swarthmore Junior High School all did experiments to find out how many licks it takes to get to the center of the Tootsie Pop. Purdue found that it took 364 licks for a licking machine that they had built, but 252 licks from some of their volunteers. Michigan’s licking machine took 411 licks to reach the center. Swarthmore did everything with human tongues, reaching an average of 144 licks.
So now I want to see for myself! It's been years and years since I've had a Tootsie Roll! Aaa 1, Aaa 2, Aaa3