When my wife and I met, I couldn't talk to her - and my defense mechanism is sarcasm. I belittle someone with verbal pokes and prods. I did it to her out of complete awe. When friends introduced us, I said 'Hi' - and turned my back. Later, I called my mom and best friend and said, 'I think I just met my wife.'
Shallow emotions. An incapacity to feel genuine love. A need for stimulation. Frequent verbal outbursts. Poor behavioural controls. These are just some of the things that social media are encouraging in all of us. They're also a pretty comprehensive diagnostic checklist for sociopathy - in fact, that's where I got the list.