From one internet stranger to another, and with all due respect: bullshit.
We as a society positively freak out over nudity and drop our middle-school kids off to see violent movies without even thinking twice.
To claim differently is to either a) appeal to an exception that does not represent the overall social norm b) be disingenuous (which I don't think is your case, to be clear) or c) not even be aware of the problem, as advanced by the parent comment.
To say the American populace (again, on the aggregate level) is both desensitized to violence and hyper-sensitive to nudity is a massive understatement, one which can be directly traced to our puritanical roots.
Seriously, this is like saying America doesn't have a problem with gun violence. It's so patently and obviously false that it borders on comical.
(I again feel compelled to mention that I mean absolutely no disrespect. I just couldn't disagree with you more.)