[wasabijuice]

Of course you wouldn't read it in front of your children.
Of course I have never seen anyone reading hardcore pornography on a train.
But I have seen men reading porno manga and children gawking, or mothers shielding them from it.

A friend of mine brought her son over from the US, and some uncouth man was 'reading' some porno manga in front of them. I'm sure the boy was delighted.

When I was a boy, Playboy was on the back rack in the candyshop, but no one read it in public.