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- Social pressure is one of the common reasons we tip.
- Social psychologist and tipping expert Michael Lynn explained what makes us leave higher gratuities.
- Smiling, eye contact, and physical contact can motivate us to tip more.
It's a Monday morning and you're ordering your caffè Americano as you do every morning, but as you tap your credit card, a new prompt pops up on the screen asking if you'd like to add a tip.
A tip for a $3.50 coffee that takes approximately three minutes to make.