So yes , I very selfishly want that again . It 's painful to watch your parents age , to get sick , to suffer . It 's painful when it 's a slow , natural process , when it just sort of hits you that oh , did he always walk that slow ? was her memory always that bad ?

Give answer the following question using evidence from the above passage: Why is the speaker saddened by the gradual decline of the elderly parents ?
They care for and love their parents and watching them age is a paniful process