Jill turned off the water, first hot, then cold, and stepped out of the shower. On the first step she noticed the bath mat felt different, in that the mat had gotten sticky somehow. Fearing she might have to replace it, she went in for a closer look. Ah, the stickiness was perfectly understandable now. the threads in her mat had gained some amount of life. She could see them writhe slowly with her unaided eye. Obviously they obtained nourishment from her foot, there are all sorts of tasty things that live on the bottom of feet she thinks. Jill grabs a towel and walks out of the room. She is going to have to get a new mat.