Pachycephalosaurus

“...(meaning "thick-headed lizard") is a genus of pachycephalosaurid dinosaurs. […] The thick skull domes of Pachycephalosaurus and related genera gave rise to the hypothesis that pachycephalosaurs used their skulls in intra-species combat.” - Wikipedia

Trapped in a corner at a party
I mix my metaphors (because I am
a mixed metaphor) saying: I wear
a number of plates, have numerous hats
in the fire, spin a great many irons. Clad
in crockery, I spin hats on sticks, impale
both plates and hats on hot irons, eat hats
on fire while ironing plates, spinning
Willow Pattern Trilbies in fine china.

What does my skull keep in?
What does a hat keep out?

This could all be due to my unusually
large head, its extended occipital ridge
preventing commitment to most headgear.
So instead I clothe my odd-shaped bonce
in special effects, helmeted in the straw
that grows in my mind. Nesting in it.
The fabric which weaves through
the warp and weft, sulci and gyri,
of this brain I claim to own.

Consider your skull in ceramic.
Consider your hat made of bone.

NB: The ‘sulci’ and ‘gyri’ are the grooves and bumps in the brain.