How many licks does it take to get to the center of a Tootsie Pop? The classic question from the 1969 commercial featuring a boy and a wise owl has no single answer—"the world may never know"—but numerous studies and experiments provide a range of results, typically between 144 and 1,000 licks.

Origin of the Mystery

The iconic Tootsie Pop ad sparked decades of curiosity, with the owl famously crunching after just three licks. This led to real-world tests by students, engineers, and mathematicians seeking precision. Purdue University engineers built a licking machine that averaged 364 licks , while their human volunteers needed 252 licks on average.

Key Scientific Studies

Multiple universities tackled this with rigor—here's a breakdown:

Study| Method| Average Licks| Notes 917
---|---|---|---
Purdue University| Licking machine| 364| Modeled after human tongue; humans averaged 252.
University of Michigan| Licking machine| 411| Doctoral student's device.
Swarthmore Junior High/Swarthmore College| Human lickers| 144–146 (median)| Kids: 144; undergrads: 70–222 range.
Bellarmine University| Human lickers by gender/color| 175| Took 14.1 minutes on average.
New York University| Mathematical model| ~1,000 per cm; ~250–2,500 for Tootsie Pop| Based on candy dissolution; adjusted for size.

These variations depend on licking style (one-sided vs. full-surface), pop size, and even flavor—thinner shells on some sides speed things up.

Forum and Real-Life Experiments

Online discussions keep the debate alive. A Reddit user tallied 1,280 licks in a mildly interesting post, sparking jokes about lick efficiency (e.g., 0.711 licks per second). Others recount childhood attempts under 1,000 but note aggressive licking changes results. Recent nostalgia threads on Reddit (as of early 2025) reference the ad's endurance, with links to "official" lick awards.

"CRUNCH... The world may never know."
—Classic forum echo of the commercial

Why the Range?

Factors like tongue pressure, saliva flow, and manufacturing inconsistencies (e.g., uneven chocolate centering) explain discrepancies. Safe speculation: Most humans reach it in 200–400 licks with patient swirling.

TL;DR: No definitive number, but science points to around 250–400 licks—far more than the owl's three!

Information gathered from public forums or data available on the internet and portrayed here.