These are my fetishes. I would love to see a girl subjected to any of the following:

Needles under fingernails or toenails.
Nail removal. Messing with the nail bed after removing nails.
Crushing the small bones in the hands and feet.
Hitting the shins with sufficient force to hurt, but not breaking them. Applying pressure to the shins.
Forced to stand on spikes, sharp enough to hurt but probably not enough to pierce.
Beheading by guillotine.
Tooth crushing or removal.
Squeezing skin under pliers.
Tickling. Not guro, but leads to humiliation. If the subject pees, even better.
Pulling out intestines.
Vomiting, especially if caused by distress.
Force feeding water. There's a torture method where the subject is force fed eater till their stomach is near bursting, and then punched until they throw up.
Fear. Anything that can bring out genuine terror. Forcing an arachnaphobe to sit with spiders, etc.
Crying, from distress.
Begging. Screaming. Moaning. Any indication of pain or discomfort.
Being hit by a car.
Being forced to take mild poison, with undesirable side effects.
Subjected to extreme heat or cold.