As already stated, sex and violence sell.

Remember the days before the change in the thumbnail rules when you went to the gallery and all you saw for pages and pages were thumbnails that contained nothing but tits and ass?  The gallery had started to look like the back of a porn magazine!

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi