Lovely question! I don't know about "everyone" but I suspect far more people with an appropriately free-wheeling imagination do than they might like to admit!
I do, sometimes, but not in my 'Artex' ceilings.
My favourite is a shallow bas-relief "face" in the entrance shaft wall of a famous cave called Gaping Gill, in NW England. It's merely irregularities and their shadows in the surface of a thick bed of limestone, but from certain angles looks slightly like a carved face tilted upwards. I've pointed it out to quite a number of people: some see it, some don't - and those who don't probably think I'm a bit dotty.
Gaping Gill is in a hill called Ingleborough, companion to another, Pen-y-Ghent, whose long profile seen from near Gaping Gill makes me think of a proud, crouching cat - a stylised ceremonial lion even.
So you're by no means alone... but as for your second question, WHY?
No reason - just harmless tricks of one's imagination, and it would be a dull world without such tricks!
cloud ceiling
The best way to paint clouds on a ceiling is by using a wet-in-wet technique. Begin by drawing a nice blue sky on the ceiling using a sea brush. Next, using white chalk draw your clouds on the ceiling. This provides you with a template when you go back to paint. Finally, go back and fill in your clouds with white paint.
The ceiling, the clouds, the sky or what your doing. :)
It is not so much that clouds form familiar images, but that our minds have a tendency to connect shapes and outlines with familiar things we know. It is purely a trick of our minds.
If the moon disappeared while you were looking at it, trust me - it's the clouds :>)
Nimbostratus clouds.
They are called Cirrus Clouds and are at 16,500 - 45,000 feet. They are made from tiny ice particles. Cirrus clouds are feathery looking because of the very high winds at that altitude.
There are three types of clouds; cirrus, stratus and cumulus. Cirrus clouds are curly looking while stratus clouds are flat or layered. The cumulus clouds are the largest, and most opposite to the cirrus clouds.
Clouds of gas.
Looking up or not thinking
clouds everyone knows that
By looking at other stuff. Suggestions: clouds pretty flowers the ground