We don't have many carpets Ana, just a rug in our sitting room in front of the fire, I have always ripped out carpets and had wood put down which I think is what made me suddenly be aware of how I felt. People can do as they wish in my house, I do keep a few pairs of soft ballet pump knitted slipper things in case visitors want them, and I always take some with me in my bag when I visit other people. My sisters do the same. Lots of people keep their shoes on in our house, but wood and ceramic tiles can be washed easily. I'm used to it in houses, after all what someone does in their own house is their own business, I just try to respect their wishes, but seeing it last night really made me think.
Is it the Japanese who provide disposable slippers? I can't remember. Yes, I read somewhere about the loo shoes - because of splashy males perhaps?