What to present a girl?

Is Ms used for both Miss and Mrs when you do not know if she is married or not? Where did the idiom bite the dust come from? What do you say to congratulate new grandparents? Where the tip to a waiter is considered as an insult? What did people use before erasers? What do you call a person who sets the standard? What is meant by the slang term hang daddy? To carry or conduct oneself in a proper way? In home alone why did marv take his shoes and socks off and why didnt he put them back on again? What is the word for unwanted suggestion and opinion without you even ask for it? How do you properly address a letter to the lieutenant governor of a state? When do you use euphemism? When a woman becomes a widow how is she addressed is it still Mrs? Where does the phrase 'don't give two hoots' originate from? When do you use Ms or Mrs? What does Faites Gaffe mean in English? Why do you take hats off inside? What are filipino norms and principles? How do you praise a guy in Punjabi? What did the french people want?