Fortunato's comment that "Decaying plants smell better than decaying meat" might be true, but the digestion of vegetable matter produces vastly more gas than the digestion of meat - check out the percentage of methane in the atmosphere of New Zealand - caused by all the sheep ! We try to avoid visiting one particular vegetarian household (nearly all female) because of the smell. They seem to spend most of their time farting and are blissfully unaware of the fact that they are doing it. After all what sort of things are blamed for flatulance ? ..... Beans....Brussel Sprouts.....