Sensual, raw sex, porn are like the subjects that get most revenue... regardless of the site... sad to say but true. I recently wrote a hub related to "too much sex". This has been a record-breaking hub in terms of viewers... almost 300 viewers in two days of publication.
The next day, I published a hub on the stock market... let me count again... 10 viewers.
Word it correctly, make sure your SEO is in place, and you can get away with murder.