I think porn has been with us from, at least, the beginnings of recorded history.  I'm not sure, but I'd guess there may be cave drawings of pornographic acts.  Here's a link to an interesting article regarding pornography "://books.google.com/books?id=wfNBQP2UaMEC&pg=PA623&lpg=PA623&dq=what+leads+to+enjoying+pornography&source=bl&ots=sX9IjyWlb4&sig=UqeWUh4_of3maIhtSvzPHAdmxLU&hl=en&sa=X&ved=0ahUKEwjAt4j_nZHXAhXowFQKHUf4BqEQ6AEIRzAF#v=onepage&q=what leads to enjoying pornography&f=false"  As the article notes, pornography demeans and objectifies women....they're "tools" for men's enjoyment...feeding the ego and the libido.  

From all my interation with Christian Right-wingers, they tend to be sexist and misogynistic....(note those qualifiers, I'm sure there are some CR individuals who treat women very well).  (cont)