Darwin theorized that mankind (both male and female) evolved alongside each other over millions of years, both reproducing after their own kind before the ability to physically have sex evolved. They did this through asexuality (without sexual desire or activity or lacking any apparent sex or sex organs). Each of them split in half: Asexual organisms reproduce by fission (splitting in half).
Friendship Never explain -- your friends do not need it, and your enemies will not believe it anyway. A real friend never gets in your way, unless you happen to be on the way down. A friend is someone you can do nothing with and enjoy it. However much we guard ourselves against it, we tend to shape ourselves in the image others have of us. It is not so much the example of others we imitate, as the reflection of ourselves in their eyes and the echo of ourselves in their words.
Uh-uh, dude. I tried it your way with the dating and the girls and the kissing and the drama, and man, I didn't like it. Plus, my best friend is a walking cautionary tale of what happens to you when romantic relationships don't involve marriage. Like you always say, kafir, everything ends in breakup, divorce, or death. I want to narrow my misery options to divorce or death - that's all.