I was always told that when making Poke, Tartare, or Spicy Tuna to use a spoon to scrape the meat from between the musculature of the tuna with a spoon. I followed this school of thought for a long time, until I realized it's not necessary and less efficient. People also say to peel ginger with a spoon which makes a little more sense. But legend has it that the only reason that that tradition was started was because Chinese people wanted to put their kids to work, so they would have them peel ginger; and since a 5 year old can't and shouldn't use a cleaver, they gave them spoons.
Anyways I find that a knife works just as well, maybe better..... and since I'm already using a knife, it's also one less utensil and therefore less time wasted.