with nothing but a word or two to go by ,your mind produced a "stereotyped"picture of the person rather than a real one
did the labels on these people mislead you into making the usual choices?then you readtoo much into them.
the harm is that the person who believes in this stereotype may act on his belief. in the case just mentioned ,you-as a young person-would be the victim ..maybe you have already had this type of experience. have you ever met a merchant who does not trust kids in his store?a bus driver who hates all the kids who go to thar school on the hill?a librarian who is suspicious pf a boy with long hair?
stereotypes distort the truth by suggesting that all people in a particular group behave in the same way. they also suggest that only these people behave that way. neither is true
nor does any one group have a monopoly on beauty , brains, glamour, strength, humour, or talent. every group has its share of all these qualities.