Hi, I want to block porn and sex websites (all of them) but when I set the advisory controls it blocks eBay, YouTube,etc. how can I put a block on porn and sex without blocking everything else?

It uses key words and other factors, so there are things of adult nature on YouTube and the such, but it should only block those parts that may have offensive material.

Look at K9 Software, it has a list of categories to selct: About K9 Web Protection - K9 Web Protection - Free Internet Filter and Parental Control Software

You and millions of other parents. Unfortunately there is no hard and fast criteria that you can use. There is the now famous instance of someone doing research on breast cancer and being blocked because breast was considered a keyword leading to bad sites.