I'm convinced that porn sites will soon start to accept bitcoin, if they haven't yet. Many people don't want to pay for porn with their credit card and the anonymity of bitcoin is definitely a huge advantage. One site that has adopted bitcoin that I know of is https://noveltrove.com, a free adult stories site, which is at the moment hosting the first ever cryptocurrency erotic stories contest. Here's the link, for anyone who's interested. https://noveltrove.com/first-ever-erotic-story-bitcoin-contest