Why i Cant make money Blogging???

In this post i ll give some ideas about themes to start your blog.
One of the most common error that a "noob" Blogger do its even before to start a Blog.
Some experienced Bloggers may have the same opinion.
I am going to relate my own experience.
Well when i started to read some articles saying that many people were getting rich or making some nice money with ads in blogs or websites...Hummm i must confess i went crazy, starting making plans where i gonna spend all that money,wich car i was going to buy,and so many more crazy ideas.
First error: Never think you going to be rich just for type some words in a blog and put some ads rolling.
In this world of ads i think not even 5% gain really good money.
Anyway to start a blog you got to have something to talk about(money business sex tech celebrities news) and so much more.
So what theme you think i get it for start??
Yes i choose to make a blog about sex.
That was my second error:Always choose something you can really know about it(of course i know many things about sex,but not how to blog it)
I start to put many videos in my Sex Blog,after a month did you can guess how many visitors i have???
2 yea lol i have 2 Brazilian guest visiting my website.
Work in something that you don't have experience gives bad results.
After this delusions i thought i got to make another one, and this time will be different.
But unfortunately i repeatedly make always same errors.
There was a time that a have more than 15 domains all kind of themes, and none of them give me money.
What i was doing wrong??
I was doing everything wrong from the start.

VERY IMPORTANT

1-Choose something you really know to talk about,something that can cause discordance beetwen the readers some that readers can discuss.Get some polemic.

2-Dont think just in fact to make money with your blog(i know its hard:P)

3-Read some trust and informative articles about seo techniques,adwords,keywords,something that could be usefull for your profits.

4-Have in mind that in the very first months you wont see great money,so be perseverance,dont give up,your time will come.

Thats all folks:P