You didn’t know that cyanoacrylate is extracted from cat hair? 
Oh, I wish my dumb cat only liked to sleep on my son’s backpack.
She likes to pee on it.
Why? I don’t know, it’s the only item she likes to “anoint” outside of her litterbox. She waits, patiently, for my son to inevitably forget himself and drop it on the floor for any period of time, so she can run over and pee on it. The poor backpack has made many, many trips through the washing machine, and is getting somewhat threadbare.
Leave kitty its pisspack, get new one for son?
My kitty has a box jones. he will squeeze into a box every time we bring one home. He curls up and sleeps. So we have a box near the back picture window with a pillow and blanket.
Maru, the strangest cat alive. He makes all our weird kitties look positively normal. 
Our cats rotate from the empty computer chair, to the bed, to the pile of boxes on the couch, to the bare wood floor, to something new I can’t possibly imagine.
Joe
One of my cats loves to sleep on my shoes. The bulkier the boot, the smellier the shoe, the more preferable they are for napping. Should there be no shoes available, he will settle for my laptop bag or, even more rarely, my purse should I leave either one on the floor or couch.
The answer to any question that starts with “Why does my cat…” or “Why won’t my cat…” is always “FUCK YOU, That’s why”
Cats are contrary like that 
**Mods, this is not me telling the poster fuck you, it’s a joke based on the contrary nature of a cat.
My cat will also sleep in a spot under a bush where ants and lizards crawl over him, rather than sleep on his bed.
He is also into the payback. If I take him to the vet (which he hates) he will seek out an article of mine and pee on it afterwards. Never anything of my wifes, it is always mine.
Cats are indeed weird.
We have one who sleeps inside my husbands big briefcase. It’s one of the large ones that rolls and can hold a bunch of stuff. She will use her head to open up the zipper if it is not wide enough and then crawl inside.
I won a raffle basket with some stuff in it a couple of years ago. I took out my loot and left the basket on the counter. Next thing you know, it became the new sleep spot. The only bed I have ever bought for them that they actually sleep in is a hammock. I spent like $20 on a fleece and plastic tubing 2 level contraption from Target and they love it. All the other beds just gather dust.
they like things that smell like us. Mine is sleeping on my fleece jacket just now…
It’s a cat. All the explanation ever needed.
Now.
WHERE ARE THE PICTURES? ALL of you know the rules about that. You mention a pet, you have to link a picture.
A pic (no backpack).
In 1976 the White Sox tore up their Astroturf infield, and gave it away in strips to any fan who wanted it. You know what early Astroturf was like–it had the consistency of coarse sandpaper. I took a strip home and tossed it on my nice plush bedroom carpet. My cat immediately adopted it as a catnap mat and never sat or slept anywhere else for the remaining four years of his life.
We’ve given up and just leave empty boxes out for a couple days so ours gets his fix. I think he just likes to pretend they’re small cat forts. Cases in point:
http://www.youtube.com/watch?v=0X_U-G3_mmQ
http://www.youtube.com/watch?v=jeOjFZVjRg8
And yes, he knows how cute he is.
With our cats I think it is a way to connect with us - I have been away from home a lot recently and when I get home Juliette & Kismet are all about camping on top of my gear and clothes. I think it is their way of saying “I love you, I miss you, don’t go again!”
Kismet in particular will go jump into your spot: bed, chair, couch; and settle in about .3 milliseconds after you get up.
Also I bet your backpack has lots of neat smells from other places, so it’s a great place to camp out and smell where you’ve been.
Well, my long-ago kitty came across a hula hoop somebody left on the floor, curled up in the center, and slept there for quite a while, as if it was a round cat bed. (I watched Martha Stewart on tv once, making Christmas wreaths, and HER cat walked onto the set and plonked itself down in the center of a wreath.) The present cat-of-the-house has a ‘kitty condo’, about 2-1/2 ft. high, round, about 16" across and he gets a lot of use out of that condo, sleeping on it, back feet and tail hanging off of it.
I buy my cats’ prescription canned food by the case. I leave a couple cardboard cases on the kitchen floor and one on the table. They use them as beds all the time. I just switch them out with new cases once in a while, because one of them likes to chew the edges to bits. I used to add a towel to a couple of them until I realized the cats really don’t care, and then there’s that much less I have to launder.
Defurbitizers(as my sister calls them)
I think my family alone keeps companies that make these things alive!