Fred 'n Marva
Fred and Marva have been married for almost 50 years. Unfortunately failing health has led the family to put them in a seniors home. Marva, always cuddly, had the habit of holding Fred's dick while watching TV or just sitting idly. Sometimes this could last for hours.
One night Fred didn't show up in the lounge. A few hours went by before Fred finally showed up. Marva was infuriated and asked Fred where he was.
Fred: "I was upstairs watching TV with Mary."
Marva: "What does Mary have that I don't have?!"
Fred: "Parkinson's."