The oder of urine that some people have after eating asparagus is not due to asparagine. It is due to a combination of sulphur-containing compounds.

The sulfur compounds include methanethiol, dimethyl sulphide, dimethyl disulphide, bis-(methylthio)methane, dimethyl sulphoxide and dimethyl sulphone

There used to be a column in the LA papers ages ago when I lived on the in LaLa town. It was called Dr. Hippocrates.

I remember a reader asking about the "perfume" of asparagus pee. Apparently the good doctor was fond of the vegetable, yet had no idea what they were talking about and dismissed the letter till he checked with some friends who confirmed it did the same to them.

He then researched it and discovered that the odor is due to a benign bacterium that lives in the urinary tracts of about 50% of all humans.

No idea whether that's the truth or not, but I can confirm asparagus is a vegetable I adore and produces a smell I don;t.