I used to think my ex-wife ate the head of the fish so that I could have more of the juicy parts. In other words, I thought she was sacrificing her taste buds for me. I have since learned that many Koreans consider the fish head to be a delicacy, which suggests that my ex-wife's fish-head eating may have been more of a selfish act than a sacrifice.
Today, I came across an old Chinese saying, which suggests that the heads of fish have long been considered a delicacy in Asia:
A fish's head is the most delicious
魚(어) - fish
頭(두) - head
一味(일미) - the most delicious