A guy I know just spent some time pondering the purpose of life.  Guys my age do that now and then.  Mortality gets a bit more real after you hit 40 and you start to wonder why you're in this game.

You know what the purpose of my life is?

I live alone and every now and then, like now, I hate it. I really wish I had a girl living with me right now. It's spring and the weather is getting nice (albeit a bit cool still) and I'd like to spend it with some pretty girl hanging on to my arm.

Then, almost like clockwork, some girl will smile at me and I'll smile back and before you know it, she's spending most of her free time with me. Also like clockwork, within a month, I can't stand it. I won't let it show externally, but she'll drive me crazy in no time.

Then, I'll spend endless hours locked up in my little computer room wishing I was alone again, and she'll lie in my bed alone wondering why I don't find her attractive.

Strive for things, achieve them, and then wish you hadn't.

That's the purpose of my life.