We can remember the flavour of a food we enjoyed ten days ago. If we eat it again, we can perceive the same taste once again and experience the same enjoyment, because its taste is now familiar. However, the tongue’s taste cells are not the same as the ones that existed ten days ago. Every day our taste cells come into contact with acidic foods that are hotter or colder than the body’s temperature.
Hot tea, an ice-cold fruit juice, thick coffee, or bitter grapefruit juice ...