Help the Aged

Was visiting a friend of mine earlier today when there was a knock on the door.
Two bright young things collecting - "Help the aged" they said.
Quick as a flash, my friend said "Yes please, all these leaves in the front garden need raking up. Hang on I'll go and get the rake"
Somewhat taken by surprise they didn't quite know what to say, so he continued
"I am the bloody aged and I need your help as offered"
They just fled. We couldn't stop laughing.