Confusion says!

confusion rather than Confucius, deliberate intent.

When the centipede

went to the doctor

for the usual checkup,

little did he know

the news was going 

to be bad.

Doctor Centipede said.

" You are on your last legs!"

But he couldn't tell him

which ones!

In the confusion.

Okay! Try the right,

now the left.

Okay, that pair is fine!