Subway Pants

If you sit on the subway, do you take your pants off before sitting on your furniture at home? Is this common among New Yorkers?

This was a concept introduced to me by my ex-gf and I have done it ever since. Now it's inconceivable to sit on my couch wearing pants I rode the subway in. It's the next stage of cleanliness after taking your shoes off inside.

Seems to be more common among people from a Mediterranean, Middle Eastern, or Asian background.