seems the people around here like to spend their bitcoin to get some pleasure at porn website.
pretty much everyone watches porn, and as a result many bitcoin users in the forum are interested to spend their bitcoin in something that they are already paying with cash 
also they can stay anonymous 
It's a huge market, and I believe people would be more comfortable buying via bitcoins because they will be less traceable to any user and hence maintain the privacy the user would expect.
I personally don't see why I would buy porn, but not everyone's the same I guess?
