Be ready to get shut down pretty quick, unless you are hosting your site with a company that allows adult material. Most do not because their upstream data circuit providers don't allow it.
I have recently researched many colocation facilities and most wont let you run porn sites. Not that I wanted to, but its in their contracts. The only one that I knew that did in the dallas area is now out of business. I am sure there are ones that do but you pay a premium for it.
Adult material is very bandwidth intensive, if it becomes popular, you better have a big fat internet pipe to back it up.