Repurposing joke:: An old man in his 80s goes to a prostitute

An old man in his 80s goes to a prostitute and asks for a blowjob. The woman gives him a puzzled look but agrees. He drops his pants and she starts to work her magic. After 25 minutes she stops and tells him "I'm sorry, I really tried but it's not even getting hard". "No indeed", says the old man with a grin, "but it's getting really clean!"