Where Does The 'Thumbs-Up' Gesture Really Come From And How Did It Come To Mean O.K.?
Hand Gestures A Cultural Guide to Hand Gestures
A Cool Guide on hand gestures than can get you in trouble : r/coolguides
Understanding European Gestures by Rick Steves
ivideyenthumpokum
Thumbs-Up: The Fascinating Origins of Everyday Hand Gestures
OK Symbol, Thumbs Up, and Other Hand Gestures That Mean Different Things Abroad - Thrillist
Ask Uncle John Anything: Origins of Thumbs Up!
ivideyenthumpokum
10 Common Hand Signs Meaning With Pictures
How Did Extending Your Middle Finger Come to Mean F.U.?
Body Language 56 Thumbs Up
Is giving the thumbs up sign in Russia like giving one the middle finger in Russia? - Quora