https://civitai.com/models/1192752/human-centipede-ponyillustrios

Not my model, or to be fair my kink.

Add to negative tags:

"Bottle" - I don't know where it came from, but it insistently tries to get into the frame.
"Gag" - it's clear where it came from, but it looks really bad in a crowd shot.
"Text, Object in teeth Object in mouth, Bottle, Gag, Text, Watermark"