In an interview earlier this year with Rolling Stone, famed author Tom Wolfe opined on the tragedy of religion’s fall from societal graces. A snippet of the audio interview can be found here.
At the end of that audio clip he says this:

“The bigger pornography gets the lower the birth rate becomes.”

I don’t know if that is true or not, but it is a rather astonishing thing to say. But knowing Wolfe’s work, he tends to know of what he speaks.
It was the continuation of a broader argument about the necessary sexual morality of religion.
I’m going to try and find the rest of the interview.