Hentai objectification vs instinct

The questionability of women portrayed as being used only for sex, and the human desire to use women only for sex.  Both go against our "civilized" mindset, yet are natural feelings.  Perhaps this conflict between what we see as lawfully or ethically right vs what we see as naturally or instinctively right, is what makes hentai so powerful a combination. 

In other words, how can this be wrong when it feels so right? 

There is also the study between sex crimes and depictions of "violent" sex acts.  A study has shown Japan has a significantly low number of sex crimes but a high number amount of violent sexual depictions, possibly indicating that a fantasy outlet can decrease sex related crimes, rather than increase them as some conservative groups claim.  From a scientific standpoint, more people need to jack off or the Earth will have too high a population density, killing us all.