In their nineties

Couple in their nineties are both having problems remembering things. During a checkup, the doctor tells them that they're physically okay, but they might want to start writing things down to help them remember

Later that night, while watching TV, the Jimmie gets up from his chair. 'Want anything while I'm in the kitchen?' he asks.
'Will you get me a bowl of ice cream?'Joan asked
'Sure.'
'Don't you think you should write it down so you can remember it?' Joan asks.
'No, I can remember it.'
'Well, I'd like some strawberries on top, too. Maybe you should write it down, so's not to forget it?'
Jimmie 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, write it down?' Joan asks.
Irritated, Jimmie says, 'I don't need to write it down, I can remember it! Ice cream with strawberries and whipped cream - I got it, for goodness sake!'
Then Jimmie toddles into the kitchen. After about 20 minutes,
The Jimmie returns from the kitchen and hands his wife Joan a plate of bacon and eggs. Joan stares at the plate for a moment.
'Where's my toast ?'