This bloke goes to see his doctor and says, "every time I fart, it sounds like a Honda motorbike."
So the doc asks the chap to pull his pants down and bend over. Sure enough, the man farts loudly and its sounds like a Honda motorbike.
The doc says, "you've got an abscess up your arse."
The bloke says, "surely it can't make my arse make noises like that."
The old doctor says, with a cheeky smile, "abscess makes the fart go Honda!"