I think the animation helps divorce the violence from reality. The sex certainly doesn't look all that realistic. I think the fact that it's animated, we get some leeway because of that.
By this means we presume we have established for ever, a true and legitimate marriage between the Empirical and Rational faculty; whose fastidious and unfortunate divorce and separation hath troubled and disordered the whole race and generation of mankind.
We must accept life for what it actually is - a challenge to our quality without which we should never know of what stuff we are made, or grow to our full stature.