An 80-year-old man insists every morning on bringing his wife breakfast in the nursing home.

When asked “Why is his wife in a retirement home?” He replied, “She has Alzheimer’s disease.”

So he was asked, “Would your Wife be worried if one day you didn’t come and bring her breakfast?” and he said, “She doesn’t remember, She doesn’t even know who I am, she hasn’t recognized me for five years.”
Surprised, a nurse asked him:

“Why do you bring your wife breakfast every morning, even though she doesn’t even recognize you?” The man smiled, looked her in the eye, then he said, “she doesn’t know who I am, but I know who she is.”