Invertie Bertie

A slimline figure
was Bertie Petite,
who above anything else,
adored to eat.

His chubby friends pondered:
“How does one keep
both an intake of such grub
and a slender physique?”

Bertie reached down his throat,
past the lungs and the sternals
and with a spleen in his grasp
spewed up his internals.

He pointed to his innards,
showing clogged up arteries,
“I’m fat on the inside!”
he shrieked (with some difficulty).

Obituary:

Even inside out,
Bertie was still fit and young,
Though a trip up a curb,
punctured his right lung.