Why Lie?

I don't get it.  WHY?  Why do people lie? WHY WHY WHY WHY? 

Let's reverse ---- I posted on Sunday Nov 21 about a special man.  He and I had been talking on the phone, emailing, texting, even web cam for several weeks prior to meeting.  We finally had our first date on Sat Nov 20th.  He is the one who said "nothing prepared me for the hotness of you".

He said all the right things, portrayed himself as a man who could give me the world on a silver platter, and indicated and acted as if the things that I liked, he liked as well.  He said he wanted the same fantasies I did, the same desires, the same level of naughtiness, he said he wanted me.

Then he left. Supposedly to go do some "military work". Said he found out on the Friday before we met that he was going to be gone for 6-8 weeks.  Gave me the option to cancel.  I stuck it out, wanted to know if he was going to be worth waiting for. As I said, it was an incredible date, we hit it off so well.  He was so sweet and wonderful and kind and just simply perfect.  Too perfect. 

I asked about his background, and then the week after we met, checked out part of his story.  The vineyard he said he owned part of, he didn't, the house he said he owned, he doesn't.  I knew right after we met about his lies, but didn't mention it.  Hoping he would come clean. We have continued to talk and text, and share stories and time with each other via email and text.  I have dedicated a good portion of my last several weeks to him.

Today, my friend was finally able to run a background check on him. I got the call in the late afternoon that my special man didn't exist.  At all.  Not for the job he says he does, or the person he says he is.  So, because I DONT lie, I texted him. 

Me:  "Do you go by any other name?"
Him:  blah blah blah "why do you ask?" 
Me:  "Because I ran a background check on you and insert your name here does not exist". 

It took a while for the response, once it came it read like this.  "I"m out". 

My response to him....."quite literally".

Why?  I'm not a judgemental person.  I mean hell I post my life on this blog. I share every slutty detail.  The good, the bad, and the ugly.  I'm just as up front and honest in person.  I just don't get it WHY?  What is there to gain by lying to me?  Or to anyone for that matter?  Why Why Why?  And the guys that I date WONDER why I have such trouble trusting people....