Funny Question:Santa Claus's Figure have to be changed?

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Recently, some people claimed that Santa Claus's Figure ought to be changed as that fat figure may mislead children into considering fattness as a healthy life style and even they can say"Mr. Santa is fat! " how do you like that perspective? then, i had three interesting questions: who and when was Santa Claus's figure created? why was it created as a man figure rather than a woman's?