Though this seemingly odd obsession over one's head size may downright confound outsiders, it is a pretty common trait that some Korean people focus on, among other physical characteristics such as small face, 'V' line chin, 'S' line, and many more. 

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For Koreans, the smaller the head, the better, but Jackson revealed that complimenting someone in Hong Kong for having a teeny head is actually an insult of a high degree. He explained, "If you tell someone 'You head is so small,' it's a diss. You're basically calling that person an idiot because the person's brain is small. But after coming to Korea I learned that 'look at how small this person's head is' actually is a compliment," and confessed, "I got an insecurity that I never had before."