In a retirement home, an old man of 90 and a lady of 80 where both wheelchair-bound. They'd always meet up at 9pm in the TV room, where the woman would place her hand on the man's crotch. It wasn't much, but it was all they had and both enjoyed it very much.

One evening though, the man never turned up and the woman was very disappointed. Three nights went by and the man still didn't turn up. Naturally, the woman assumed that he'd passed away. But, as she wheeled herself back to her room, she spotted the man wheeling happily around the back garden of the home.

She wheeled up to him and said 'Hey, where the hell have you been these last few days? I've been waiting in the TV room, I've missed you and I've missed touching you!'

The man said he was sorry but he'd met another lady. The woman, tearfully said 'Well what's she got that I haven't?'.

The man sighed contentedly and replied: 'She's got Parkinson's Disease!'