Slit your guts

Pardon, please, the narrow
Confinement of your limbs
Unfortunately, it's necessary
For your correction
Shriek to your heart's
Content, if you wish
I promise you pain and
Nightmares, in that sequence

Permit me to introduce you to
Tuesday
I favor her, this pretty blade
So tall and fine
Hatred and violence are not
Our ways, but firm we are
Squirming is useless, so is this
Colon, cry for me

Svelte is implement
Its gentle caress lets you bleed
Its subtle curvature
Dancing, deeply slit your guts

It's for your own good
You need guidance, I provide
What is your pleasure? This is
Mine A welcome change!