That's precisely why porn has exploded. Wives trying to be down with feminist movements, trying to compete with their husbands, etc. Who in the heck would want to get married now only to see half of their assets taken away by the state.
Porn has exploded because it takes zero effort and costs zero money to view it privately.
In the old days of magazines and VHS rentals, you had to seek it out. Go to a gas station or adult bookstore and buy a magazine, or the cordoned-off backroom of the family video-rental store --and they weren't cheap. And you took the risk of running in to someone you knew. Imagine the gossip if the neighbor saw your car in the parking lot of the adult bookstore or your wife's best friend saw you sneaking out of the XXX section of the video rental place?
There are no such risks today. Porn sites are some of the most popular sites on the internet. "Private" browsing is available on every browser. It is free and seemingly endless.