If no child was used in its production, then I most certainly do wish to defend the right to publish and read kiddie porn.
There is a very good reason why the Bill of Rights reads the way it does. Congress is not to get into the business of deciding what are allowed ideas, feeling, or speech. This is not a slippery slope, it is simply an abrupt end of freedom of speech. How would you like it if a humanist democratic congress decided that worshipping God as your religious commitments dictate is obscene? This is not a far-fetched example, it is vengefully historical.
This tells me everything I need to know about you and your attitude.