Great Poem: Craig Raine's "a Martian Sends a Postcard Home"

I just discovered this poem, and it took me about three readings before I understand everything that was going on. A riddle poem is always nice to read because of the challenge. Toughest line to figure out? "Only the young are allowed to suffer openly. Adults go to a punishment room with water but nothing to eat." It took me a bit, but I'm fairly certain I got it. Be curious to hear what you think.

A Martian Sends a Postcard Home
by Craig Raine

Caxtons are mechanical birds with many wings
and some are treasured for their markings --

they cause the eyes to melt
or the body to shriek without pain.

I have never seen one fly, but
sometimes they perch on the hand.

Mist is when the sky is tired of flight
and rests its soft machine on ground:

then the world is dim and bookish
like engravings under tissue paper.

Rain is when the earth is television.
It has the property of making colours darker.

Model T is a room with the lock inside --
a key is turned to free the world

for movement, so quick there is a film
to watch for anything missed.

But time is tied to the wrist
or kept in a box, ticking with impatience.

In homes, a haunted apparatus sleeps,
that snores when you pick it up.

If the ghost cries, they carry it
to their lips and soothe it to sleep

with sounds. And yet they wake it up
deliberately, by tickling with a finger.

Only the young are allowed to suffer
openly. Adults go to a punishment room

with water but nothing to eat.
They lock the door and suffer the noises

alone. No one is exempt
and everyone's pain has a different smell.

At night when all the colours die,
they hide in pairs

and read about themselves --
in colour, with their eyelids shut.