Despite the dirt and grime gathered from walking in the streets, you began to find an indescribable feeling of joy when your owner arrived at the office, requesting you to clean the soles and heel of her shoes.
As, ever since she found you and ordered you to accomplish this "job" for her, she stopped wiping her feet on the mat at the entrance of the building, preferring to make you fulfill that role instead. After-all, she did need to find a purpose to your life, seeing as how small you'd become, so as the saying goes "if the shoe fits" ...