It can be heartbreaking for those who invest a great deal of time and energy in creating a meal for their loved ones to realize that thinking about something else immediately after they have eaten is often true of most people, and few of them will give further thought to what they just consumed. For those who are on a diet, it can be an ingrained habit. They are busy thinking about their next meal, and few of them want to remember how badly they have strayed from what they should have been eating.
For those with health concerns, they should be eating for the future. This is often not the case, and it has more to do with the need to move forward in life than a lack of good food. Many people do not waste much time thinking about a previous meal, so it should come as no surprise that eating to ensure future health is often something they struggle to do.