I like nature shows, especially anything to do with the ocean. One of my favorite useless-trivia-tidbits is the habits of a little fish that looks like a big darning needle. Being fairly small and helpless it tends to hang around with sea cucumbers, that way if danger looms it can hide . . . by inserting itself tail first up the cucumber's backside.
Then the completely professional, deadpan, narrator voice said "In any symbiotic relationship there is a benefit to both parties. The benefit to the fish is clear, it is able to hide from its enemies.
The benefit to the sea cucumber is less clear."


I wonder how many takes it took to say that without giggling.