Why Do Women Give Bad Directions?

I just got back from a trip where I was intending to assist the missus by going to several of her worksites and do some work on her behalf. You know, give her a break.
Well, I never actually managed to get to all the places I wanted - I was able to get to the ones that had to be done, but I thought I would take the time to cruise around and take a look at the others places, so I could find them maybe during the week, and give her a hand.
So, I didn't find the places. I reviewed the directions when I returned, and I don't believe that I could get to all of them even now. The reason for this is the directions that women give in abot 99% of all cases, so to illustrate this, I will give an example of an actual journey description that I would give if asked, although I have changed the landmarks and road names. I will then follow this with a description that a typical woman might give for the same journey.

My Description:
Go out of this driveway, and turn left.
Go to the bottom of the road as far as you can go, where there is a stop sign at a 'T' junction.
Turn Right, and go about half a mile including passing a pizza place, until you reach a main crossroads where there is a stop sign with red flashing light and a gas station and pharmacy. Be careful, it is not a 4 way stop, the road going across has priority.
Turn Left, and go along for quite a few miles, I reckon maybe ten minutes, during this time you will pass Dorkville village sign, then Moronville, then as you carry on you will pass the signs for CretinTown. Once yo have reached the sign for CretinTown, slow down, because you have to turn off there.
Soon after entering CretinTown, you will see a Fire Station and Community Hall on the Right, with he name 'CretinTown Community Hall' on it.
Just past the Fire Station there is a small road on the right, I don't remember the name, but it is maybe 2 or 3 houses only past the Fire Hall.
Go down there and you will see a Yellow house on the left, maybe 3 houses down, and that is the one you want. The guy has a powerboat outside on a trailer, and the house has a garage at the Left side of it, but built in as part of the house. The guy runs a White Ford Pickup truck with an oil drum always sticking up from the bed.

Now the womans description:
Go down to the end of the road and turn right.
Go down to I think it is the next crossroads, and turn left.
Go a few miles until you are in CretinTown, and the road is just there on the right, with the house you want just a little bit up that road, it is really easy, you can't miss it, he might have a truck outside.

And that is why it is best to get directions from a guy!