It's wise to always sample food before serving it.
Kevin is preparing a meal for his girlfriend based on a recipe from his mum.
Kevin wants to make sure the meal is tasty.
While cooking Kevin tastes the meal repeatedly, adjusting the seasoning as needed.
While cooking the meal Kevin follows the recipe without tasting anything.
Kevin is proud to serve a tasty dish to his girlfriend.
After serving it Kevin is chagrined to discover that the meal is under seasoned.