A couple in their nineties are BOTH having problems remembering things. They decide to go to the doctor for a checkup. The doctor tells them that they're physically in good condition for their age, but if they are having trouble remembering they might want to start writing things down to help them.
Later that night while watching TV, the old man gets up from his chair. "Where are you going?" his wife asks.
"To the kitchen" he replies.
"Will you get me a bowl of ice cream?"
"Don't you think you should write it down so you can remember it?" she asks, recalling the doctor's suggestion.
"No, I can remember it."
"Well, I'd like some strawberries on top, too. You'd better write it down because you know you'll forget it."
He says, "I can remember that! You want a bowl of ice cream with strawberries."
"I'd also like whipped cream. I'm certain you'll forget that, so you'd better write it down!" she retorts.
Irritated, he says, "I don't need to write it down. Just don't start with that! Leave me alone!! Ice cream with strawberries and whipped cream. I got it, for goodness sake!" Then he grumbles on into the kitchen.
After about 20 minutes, the old man returns from the kitchen and hands his wife a plate of bacon and eggs.
She stares at the plate for a moment and says, "Where's my toast?"