At dinner once with friends I wasn't well. Forever after they told people that I eat like a bird.
At lunch once with colleagues I ordered fries for the table. Forever after they told people that I eat like a pig.
At an airport once I offered a colleague some aspirin which I carried in my computer bag. Forever after she told people that I'm a walking pharmacy.
Hasty generalization. Classification with inadequate data. Is this human trait in part the origin of racism? Or is it its result?