An apologetic note from a thief was left on a bicycle he "borrowed" to take part in the Cambridge Naked Bike Ride.
The panicked owner of the bike noticed it was missing from near Jesus Green last weekend.
The brown town bike had been pinched by someone who want to join the fourth annual naked bike ride in the city on Saturday (June 16).
Fortunately the missing bike was returned and disinfectant was not needed – the hapless thief had been too hungover to take part in the event.
The hilarious note, which was shared on Facebook by the bike owner's friend, said: "Dear bike owner, My friend apologies (sic) for taking your bike last night. He was very tired and wanted to join the naked bike ride today but doesn't own a bike!
"Thank you for lending yours, don't worry though he was too hungover to take part.
"Yours, Your friendly neighbourhood bike borrower."
A friend of the stolen bike owner told Cambridgeshire Live: "It happened near Jesus Green three days ago. He was panicked at first that the bike was gone but relieved that they returned it. They returned it the next day.
"They also brought it back to the same place. Don't think he has any negative feelings towards the ''borrowers''."
Dozens of cyclists dared to bare it all for Cambridge's World Naked Bike Ride event.
The Cambridge ride is part of a series of events held around the world where naked cyclists hit the streets in a protest against car culture and to raise awareness of the vulnerability of cyclists.
"He is just glad that they returned it and also did not use it for the naked bike ride," the bike owner's friend said.
The man confirmed that the bike's lock had been broken off by the hungover thief.
A cheeky final postscript on the note left on the returned bike read: "p.s. nobody can break a D-lock."
"He now has bought a D-lock," the bike owner's friend added.
Cambridgeshire Live tracked down the owner of the "borrowed" bike who said: "After taking the bike they could have left it anywhere or even made a bit of money.
"So I was glad for the bike and the cheeky note.
"[I'm] glad they put it back with the lock and nothing missing the following day cause I use my bike all the time here.
"I made sure to buy a better lock straight away."
Asked what he would have done if the thief had used the bike on the naked ride he joked: "Burn the bike!"
He added: "If they actually had used it for the naked bike ride I just wish they disinfected [it] and did not mention it in the note."