You spoon-fed your son by spooning some soup or a piece of pancake into his mouth.
When while holding the spoon in front of him, is it correct to say "Yum! Yum! Take a bite"?
I don't understand why some native speakers decide to say like that because the boy didn't bite a piece from a large piece.
I think the correct way is to say "take a spoon / a spoonful of soup / a piece of pancake". But I may be wrong.
Check out this noun meaning of "bite".
Merriam-Webster "bite" noun 2
noun 2: food: such as
a : the amount of food taken at a bite : morsel couldn't eat another bite
b : a small amount of food : snack have a bite to eat
So, "take/have a bite" can mean to eat a small amount of food.
For soup, "bite" is less likely.
Considering the context of feeding a small child, it would not be inappropriate at all to use a small, simply understood word like bite. If in the context of offering food to an adult you use the term, you can generally assume that a table fork or spoon will only contain enough quantity of a food to be considered a bite. So, in essence, you are not suggesting the recipient take a portion of the amount that you have offered on the spoon/fork/spork. You are offering them the entire contents of the eating utensil. Which is only a bite-sized portion of your whole meal.
