How much you can hold it ??? YAWNING By Susan Ibitz | 14/07/2020 http://humanbehaviorlab.com/wp-content/uploads/2020/07/JULY14.mp4 YAWNING IS THE SECOND MORE CONTAGIOUS EXPRESSION Watch why. See you next week Susan Posted in Coffee with Science and tagged #pets #cats #dogs ← Best Vice President for each candidateWhy Fear and Arousal look the same ??? →