>Why do humans here want to have sex
I don't know. I suspect that at least some of /r9k/ are tards, other part of them maybe are going through true suffering and may seem sex and garufurenzu as an ideal/key to peace and happiness.
>and why are many here depressed and angry?
Can't say about all anons, but some of us are going through tough times and that's the board where we unite for talking about this. I have 3 diagnosed mental disorders, for example :3 ... that's why I post about being depressed here