Why do some guys strongly prefer Asian women while others prefer Caucasian women?

Some of my guy friends really adore Asian women. Three of them love their delicate features and feminine looks and slim bodies. Two of my other guy friends prefer Caucasian women, because they’re bigger and more shapely. All the guys have such a strong preference for a specific race or build that they don’t want to move away from that preference. Isn’t it interesting?
Why do some guys strongly prefer Asian women while others prefer Caucasian women?
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