AdultWriters: content is two syllables, so . . . hope AdultWriters is just a screen name, and not what you do
UnseenWorld: Actually, you are wrong. Public Domain is a product, in this example pics, which the holder of the copyright has given permission to the world to use. The holder of the copyright of a library worth of content can post it on a newsgroup, and declare it public domain. I hold the copyright on pics of an ex-wife or ex-g/f blowing me. I can post them here, or on a newsgroup and declare them public domain. It does not mean that I do not own the copyright, it only means that I have given up any protection provided by copyright laws.
The same thing happens when the composer or a song dies, and enough time has passed with no one handling his estate having filed the paperwork required to continue the copyright protection. Freeware is public domain.