A lady had a condition on her feet that needed to be soaked in a solution twice a day for 30 minutes. She was like most of us, too busy to sit for 30 minutes twice a day to take care of this problem. So she poured the solution into a pair of rubber boots and continued with her household chores sloshing around in her medication. It worked so well for her that she wrote about it on the Internet.
A gentleman was given some ointment from his doctor for the deep callouses he had on his feet. The expensive ointment didn't last long enough for the condition to clear up and he was reluctant to buy more because of the cost.
He read the label and discovered that the main ingredient was uric acid. Deducing that urine is uric acid he began soaking his feet in his own man-made product and was happy to post to the Internet that his feet are now as soft as a baby's.
And now you know.