Old age set in and forgot I'd already done the previous one...lol!!! 

An elderly gentleman had serious hearing problems for a number of years. He
went to the doctor and the doctor was able to have him fitted for a set of
hearing aids that allowed the gentleman to hear 100%.
The elderly gentleman went back in a month to the doctor and the doctor
said, 'Your hearing is perfect. Your family must be really pleased that you
can hear again.'
The gentleman replied, 'Oh, I haven't told my family yet.
I just sit around and listen to the conversations. I've changed my will
three times!'