They're not just for humans anymore.
The linked article summarizes another article that summarizes two food-related animal studies: one with whales and one with monkeys.
The whales study is actually more about learned behavior than food trends, but the monkey study is fairly dead-on, suggesting that when we try kimchi, we're really just trying to be cool (and, ultimately, revealing our beta-ness).
I buy that. Partially. Group behavior - whether it's monkeys or people - is more complicated than the simple study described at the link. But it's interesting anyway.
Food for thought, as they say.