Why exactly are some of the elderly keen on doing housework?

Because they know they are getting old, but they don't want others to think they are useless, especially because they are afraid of becoming a burden to their families, so they want to do something they can do to prove their worth. Moreover, with the society developing so fast, they can't learn high technology or anything else, and the generation gap between them and their children is getting wider and wider, so they need to do something to fill the gap in their heart even more. My grandparents are such old people. Grandpa is 80 years old and grandma is 75 years old, but they still take care of their own life. Grandpa always said that just because people are old doesn't mean that they are useless, and doing housework is also good for their health. If they sit on the bed all day long, their brains will deteriorate~ So it is their pleasure to do some chores for the elderly. In the future, one day we will also become such an old man, to be heart to heart.