Why is the porn business so big in America?

Its quite simple.

Why America?

Why do we have the shame of being the worlds biggest porn producer and exporter?

Why do we have RealityKings, Brazzers, Pornhub, Girls Gone Wild, etc...

Why not Brazil? Why not Spain?

When you look at world history, certain nations had more pornography than others.

Ancient Persia had a much more pornographic culture than Ancient Greece.

Mark Antony chose to rule the Eastern provinces of Rome because life there was more promiscuous and delicious than life in the crude west.

Medieval Italy and Spain was far more pornographic than medieval Germany.

The British Empire in the early 1800s was frighteningly frivolous. France in the late 1800s even more so.

Now we are at a point were America is dominant. You also have countries like Thailand, Japan and Brazil who are very pornographic as well.

But why? What makes a country more relaxed in pornography and sex?