America and cartoon sexuality

I'm not talking about lolicon or anything, but what makes America so squeamish about animated sexuality and sexuality in general?
The same question goes for cartoon nudity (does not necessarily include sex).

When translating manga to anime, should the animators add unnecessary fan service and echii at all?
For instance camera angles are usually up skirts or focused on panties.
Not that I'm complaining, but is that really necessary?

It also comes from it's own country on TV!
I frequently watch Anime Network, and I came across a show rated TVMA (America's hentai rating), so I start watching and realize what I'm seeing is 13+ (= to TV14).
The reason it got that rating is an inside look at a cartoon bathhouse (nothing sexual at all).

In general, the U.S. has less problems with violence and more with sexuality, and Europe tends to be the opposite. In general.

Discoman wrote:In general, the U.S. has less problems with violence and more with sexuality, and Europe tends to be the opposite. In general.

Actually, I already knew that.
My question is why the cultural barriers?

Why can't we be one in opinions?
I know rape and the degradation of women (at least on TV) doesn't seem to bother the Japanese, and it's the same for nudity and the French as well as naked children and Greeks.
I've also heard in Sweden and Finland consensual sex can be as early as 9 (must have written or verbal parental consent for 8 and under).