That I can turn on the TV at dinner and see an eviscerated corpse (thanks "Bones"), but I can't see a topless woman because that's harmful in some way (?)
Yes I do agree with this 100%. In America it's worse to see anything sexual but blood/gore/death is 100% ok.
I know my German friends said it was weird that nobody can drink outside, yet we are a country of heavy drinkers. They also commented that we use "wagons" while shopping, and usually stock up considerable more.
I think it really depends on which part of the USA that you talk about because areas vary a lot when you talk NYC-Metro vs Mid-West vs West-Coast etc etc