"tell us a little about yourself"

how do you usually answer this question. isn't better to say how tall you are, give color of eyes, describe physical appearance than say where you come from, who your father is etc etc people have stereotypes and if you say who you are by talking about your family or country to a stranger you might trigger a stereotype in people's minds. why do we ask this question? can't you just form your own opinion about me over time without asking me to tell you who i am?

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