I have a certain conversation on a weekly basis. My view is constantly changing and the topic never grows old for me. I imagine one of the first conversations on the topic of guys and girls being 'just friends' went something like this...
Mary and Sarah sit in loincloths eating raw meat...
Mary: Sarah, we missed you yesterday at dinner. We played hangman on the cave wall, ate burnt leaves and drank from a muddy puddle. It was wonderful! Where were you?
Sarah: Oh, Jacob and I went rock picking and then he speared something, which we quickly ate to avoid having to share it with the tribe.
Mary: You went with Jacob? Alone? Sarah, I have to ask, do you covet Jacob and want to bear his children? Do you wish to look under his loincloth?
Sarah: No Mary, Jacob and I are just friends.
Mary: Just friends? Is that possible?
Sarah: Why wouldn't it be?
Mary: I've just never imagined that people with fitting parts could possibly be just friends. Are you sure this can happen?
Sarah: I think so... I mean, I don't think I want to run into the bush with him and I don't think wants that either. I think we are happy just spearing animals together and seeing who has the most impressive grunt.
Mary: Fascinating. Man and Woman. As friends. This needs further discussion, but for now let me pick the bugs out of your hair. I'm starving.