What's interesting to me is how Americans don't bat an eye on all the violence exposed in movies, music and games, but then become prudish when it comes to sex. And these are the traits of the exported American culture. In my European country it is perfectly normal to have pictures of your children naked. It's also OK for them to see a nude body now and then, like at the beach (and yes I am aware that I'm not talking…
Germany had a HUGE problem with the violence (even the 18+ version has blood and dismemberment removed), US criticized the sexuality (two achievements were called 'topless' and 'gang bang'), and in Japan it was about the promotion of drugs (you could get drunk to perform extra skill shots) and to a lesser extent about the violence.
So every cultural region has its own ideas of what their children need to be shielded from (and what to blame social misconduct on). But they all fail to realize that the children of the others, who get exposed to the 'bad stuff', still turn out fine by some miracle.