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Vocabulary:

Tipping is the act of giving an amount of money to someone who has provided a service, especially in a hotel or restaurant.

First-hand means from the original source or personal experience; directly. 

A social norm is a socially acceptable or appropriate behaviour in a particular social situation.

Hospitality is the business of providing food, drink, and accommodation for customers of restaurants, bars, etc., or guests at hotels. 

Harsh means cruel, severe, or unkind.

Disdain refers to the feeling that someone or something is unworthy of one's consideration or respect.