Honda

There was once was this guy who developed a bad case of flatulence. The smell was quite embarrasing, but what was worse was the sound which was a loud "HONDA!" He went to a number of doctor (of course) and none of them could help him (as is always the case in these tales). Finally out of desperation he went to an old chinese doctor and explained his problem.

Without any examination the doctor said, "You have an abcessed tooth, have it fixed and your problem will be solved." So he went to a dentist, and sure, enough he did have an abcessed tooth, which he had repaired, and his "HONDA" farts went away as well. So he went back to the chinese doctor and said, "What's the punch line?" -- or was it, "How did you know that I had an abcessed tooth?"

"Because", said the chinese doctor, "everybody know that ...

... abcess make the fart go HONDA!"