Why is it that a girl's room is always tidier than a guy's room?

This is without exception to race, regional affiliation, age, other factors. One might wonder that since Singapore is a very clean country, a Singaporean guys room might be tidier than an Indian girl's room. No, no way. Yes, his room is tidier than an Indian guy's room, but it is really hard to say that a Singaporean girl's room is tidier than an Indian girl's room.

It appears to me to be an universal axiom that girls are tidier than guys. And it is not so that my room is untidy, you wouldn't find much dust, but here is a description of how messy it is from left to right.

I will divide it into three zones left to right- left, desk and right, and two zones front to back, front and back.

left back - bed, with two pillows and a bolster thrown awry, a blanket, unfolded. near the left foot of bed, there is a pile of clothes that have been freshly washed, and await folding and filing, hooked to the wall above, a speaker.
left front - an easy chair given to me by Stanimir Milenkovic, an affable Croat who found it impractical to haul the easy chair back to Darmstadt, Germany. Some formal clothes, an iron, and a pillow lie neatly on that easy chair. I don't remember the last time I used that easy chair. A folded cat'ai [sewn reed carpet] lies near the chair. 2 packs of maggi lie under the easy chair.
desk back - some cups that i use for holding pens, glue, stapler and other stationery, an empty box that held moon cakes, a small teddy that I got from a dot com, lying on his back, a Marathi dictionary that covers the teddy's face, an Apple CD holder on top of that book, an Emacs hand book on top of the cd holder, a Skippy jar, a spool of 20 CDs, my monitor, on top of the monitor lie a speaker and a camera, in front of the monitor lies a networking book, to the right of the monitor lie a maggi vessel [washed], a can of powdered cocoa, brut deodorant, jovan musk deodorant, a stack of Beatles CDs, an empty box that held cakalis once, a learn Chinese quick book, a sachet of maggi soup, the thinking buddha that i found on the road, 20 AAA sized batteries [for the camera], a bottle of septillin [for my cough], my Lycos cup of hot water, my medicine box, innumerable books and notes, the images and idols of some Hindu gods, my phone book, some more medicines, a box of pot-pourri, the shelf above the desk has many folders, books and CDs, also a trophy, the wall above the desk has an Indian flag.
desk front - my chair, my computer casing, another monitor for me to watch movies while lying on the bed, another chair with wheels that has my bag, a pair of shorts and a shirt lying on it, a 5-litre can of detergent, two plastic buckets, almost full of clothes.
right back - my flight suitcase [empty] my casing box, filled with useless stuff that I'll throw away when i move, some bus plates that i stole, my monitor box, another speaker.
right back - a toiletry cabinet, another medicine cabinet, and a drawer for old books. a wardrobe, where dried, folded clothes are filed. the top of the wardrobe also serves as a food cabinet, on top of the wardrobe are a badminton and a squash racquet, a pearl jam poster, and two books about human anatomy and cars. an umbrella hangs from the wardrobe door.
as postscript i had to add another section,
the floor - it has some bits of paper, an handkerchief, a bottle of Lavenus shampoo that seems to have fallen of the toiletry cabinet, an empty bottle of coke, and a Starhub bill.
Apart from that, there is not a single spec of dust. so why do girls put those cute things on the wall, sayings by Vivekananda, Australian aboriginal paintings, photos of their families [enlarged], a rug on the floor, things like these? and tell you what, I feel these unnecessary things cause a lot of confusion.
Ask a girl for some glue, and she will fumble. I'll go, desk front, left, cup no 3, and voila there it is! keeping only what you need makes life so much easier....alas....