I remember the days when movies shown on aircraft were edited for both content and dialogue.
These days, with so much content expected to be available at your fingertips, both in your seat and people bringing iPads on board loaded with R-rated streams, it's expected to be mindful of your neighbor on such things.
How that is distinctly "American" I don't quite understand.
Is it considered normal in Europe to watch pornography on public transit in public so children can see it?
>Lufthansa longhaul flight
My experience is different. Old planes, and Lufthansa cabin crew are cold and service was poor and inattentive.