the answer is in the urine

On a recent camping trip my friends and were discussing a book that I had meant to bring with me called "Why do mean have nipples?" Its a fascinating book, about all the crazy things patients want to ask their docs, but are too afraid to bring up until their third martini. And before you ask, no, I'm still not sure why men have nipples.

The discussion lead to why asparagus makes your pee smell awful. Well low-and-behold, the second question is aimed at answering that!

"Asparagus contains a sulfur compound called mercaptan. This is also found in
garlic, onions and in the secretions of skunks. The signature smell occurs when
this substance is broken down in your digestive system. Not all people have the
gene for the enzyme that breaks it down, so some people can eat all the
asparagus they want and never stink the place up. One study in Britain found
that 46 % of British people produced the odor, while 100% of French people
tested did. Insert your favorite French joke here__________________-."