Okay some people take their shoes off when they enter a their own house.
Some people make other people take off their shoes when they enter their own house.
And some people out of habbit take their own shoes off when they enter other peoples house.

And of course being a Californian at heart the ultimate would be:
I have a friend who takes his shoes off when he drives his car.
Hey, if you love your car as much as some people do, and you want to keep it clean and neat, why not take off your shoes when you drive. In addition, he claims it helps him feel the pedals better.