What is it that makes us do the things we do? Is our only function in life to mate? Why do people have this sick overwhelming drive that makes them do so many things. I know many rape victims. I listen to their stories and it hurts a lot. They're surprised to know that I had the same experience when I was 11. As you can tell, that's pretty much one of my main reason for depression and the reason I dont like humanity much.
Hey mate. I haven't posted here in weeks (please forgive me!), and I've noticed these questions you've been asking. They are perfectly normal questions - I used to ask these questions too.
The way I see it, and I'm a logical guy who breaks things down and looks at how things really are, is that we have natural desires, bad temptations, that it is our duty to control. Without this self control the very concept of society/humanity/whatever you call it falls apart.
I'm sorry to hear of your experience. People who do stuff like that are just rotten to the core. They can't control their temptations for whatever reason - weakness to give in to the temptation, psychological issues, or being just plain evil. That's why people do this stuff.
"Is it our only function in life to mate?"
No. Don't fall for that one. That's what all the guys in prisons across the world for rape fall for. It gives them an excuse for why they did what they did. It's BS.
What is our purpose in life? The way I see it, it is to lead as good a life as possible - take the moral high-ground, help others whenever possible, and enjoy your life without being greedy or exploiting others. That, and avoiding the "Humans are just animals" BS that is frequently spouted. That kind of stuff just gives people reasons to commit horrid things like rape and murder.
I'm sorry to hear about your depression too, I know how it feels... take care, bro. And remember that not all humanity is bad! The world is a good place, you just need to look through all the crap that goes on to see it, which nowadays is not an easy task, but the good is still there.