Because Adult is bad. If you do anything Adult it's bad. Have to keep up the corporate personna for the public. Then do whatever the hell you want behind closed doors. Yahoo makes a lot of money sticking it to the Adult Industry for ads. Why share those revenues? Funny I have yet to meet one person who is walking on this planet today that was not the result of two other people having sex. Yet here we are 1,000's of years later and it's still treated like its the work of Satan. Go figure? We live in a world of double standards and the internet is no exception to the rule.