The asparagus mystery has been solved. The upshot is that those of us who have experienced the phenomenon in question are genetically superior to those of you who haven't. The link isn't working, so I'll just paste it here: "Asparagus is filled with sulfur-containing amino acids that break down during digestion into six sulfur-containing compounds. These can impart a unique smell to urine as they are excreted. 'It's the same sulfur group that makes skunks smell,' said Barbara Hodges, a dietician with Boston University's nutrition clinic, the Evans Nutrition Group. Scientists remain divided on why people have different urinary responses to eating asparagus. One camp thinks only about half of the population have a gene enabling us to break down the sulfurous amino acids in asparagus into their smellier components. Others think that everyone digests asparagus the same way, but only about half of us have a gene that enables us to smell the specific compounds formed in the digestion of asparagus." Well, upon a second reading, the skunk thing gives me pause, but nonetheless I remain stubbornly proud of my genetic make-up.