I really like this one! Tell me if you do too!
A 90-year-old couple were having problems with their memory, so they decided to go to their doctor to get checked out to make sure nothing was wrong with them. They explained to the doctor about the problems they were having with their memory. After checking the couple out, the doctor told them that they were in good health, however, the best thing to do was to start writing things down and make notes to help them to remember things.
Later that night while watching television, the man got up from his chair and his wife asked, "Where are you going?" He replied, "To the kitchen to make a sandwitch." She asked, "Will you get me a bowl of ice cream?" He replied, "Sure honey." She then asked him, "Don't you think that you should write it down on a note so you can remember it?" He said, "No, I can remember that." She then said, "Well I would also like some chocolate syrup on top. You had better write that down because I know you'll forget that." He said, "I can remember that, you want a bowl of ice cream with chocolate syrup." She replied, "Well I also would like whipped cream on top. I know you will forget that so you better write it down." Now irritated, he said, "I don't need to write that down! I can remember that." He then goes down stairs to the kitchen. After about 20 minutes he returned from the kitchenwith his sandwitch and a tray and handed her a plate of bacon and eggs. She stared at the plate for a moment and yelled angrily: "I TOLD you to write it down! You forgot my toast!"