As is often the case, this paradox can be resolved by recognizing that one of the assumptions is wrong. Here, it's the assumption that U.S. society routinely rejects cruelty and degradation. In fact, the United States is a nation that has no serious objection to cruelty and degradation. Think of the way we accept the use of brutal weapons in war that kill civilians, or the way we accept the death penalty, or the way we accept crushing economic inequality. There is no paradox in the steady mainstreaming of an intensely cruel pornography. This is a culture with a well-developed legal regime that generally protects individuals' rights and freedoms, and yet it also is a strikingly cruel culture in the way it accepts brutality and inequality.
That's Robert Jensen, a journalist at UT. You can read a review and excerpt of his new book, Getting off: Pornography and the end of masculinity.