"Customs are made for customary circumstances, and customary characters."

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You must not refuse any additional cups of tea under the following circumstances: if it is hot; if it is cold; if you are tired; if anybody thinks that you might be tired; if you are nervous; if you are gay; before you go out; if you are out; if you have just returned home; if you feel like it; if you do not feel like it; if you have had no tea for some time; if you have just had a cup.

— George Mikes