I defy anyone to prove that the founding fathers intended for the US Constitution to protect the production and sale of pornography."
Amendment IX: The enumeration in the Constitution, of certain rights, shall not be construed to deny or disparage others retained by the people.
Amendment X: The powers not delegated to the United States by the Constitution, nor prohibited by it to the states, are reserved to the states respectively, or to the people.
Neither of those two amendments
protect the use of pornography. They reserve the rights of the states or the people to decide such issues for themselves. In other words, the Constitution, if we were ever to actually honor it, denies the federal government the authority to ban pornography (or almost anything, for that matter) but does not prevent the States or local governments from doing so.
Unfortunately, in recent practice, particularly with the Texas sodomy laws, the Supreme Court has decided that somehow, inexplicably, the Constitution does indeed limit the power of the States in this regard. If you take the argument that the Constitution protects pornography, then you are actually arguing against those two amendments above, rather than for them.