It is a general rule to err on the side of formality rather than of intimacy. - Judith Martin

A gold digger may no longer be someone who strings gentlemen along while she works busily to get hold of their fortunes. She is more likely to be someone who strings gentlemen along because she is too busy for them while she is working to make her fortune.

Dear Miss Manners: What should I say when I am introduced to a homosexual "couple?"
Gentle Reader: "How do you do?" "How do you do?"

One can become quite proficient at this amiable patter; the trick is to omit the instructive parts when attending formal dinner parties outside the house.