Little known fact...
If you eat enough asparagus (I mean bowls full), your urine will actually be able to stain marble. In a past life I was on a construction site where the stone masonry contractor failed to give his men a meaningful xmas bonus one year. They all came to work eating asparagus all day and then climbed ladders at the end of the day and pissed all over the walls of the bank lobby they were working in. The next day there were streaks stained into all the marble on the walls and the work had to be re-done...
