The mouse lays on the operating table. She is calm. She is also restrained.

The doctor looks down on her, next to the light. Beside him on a tray is a collection of items.

He picks up one, a wheel with spikes, and begins to run it up and down the mouse's body. The pinprick sensations are intense, but over in an instant, and reappear somewhere else, intense, but over in an instant. She feels the wheel poke into her breast, into her thigh, up and down the soles of her feet. She reacts naturally, squirming, giggling at times at what her body interprets as tickling. She has not been given any other directive.

He sets down that one and picks up another. It's a speculum, and he lubricates it and inserts it into the mouse's vagina, opening her up. She has done this before, though usually she knows why. The doctor is unusually reticent about his motives. she has not been given reason to distrust them, and so despite a little discomfort at the cold of the metal, she does not protest.

He runs a gloved hand over the mouse's labia, and finds her clitoris, and begins rubbing. The speculum moves slightly as her inner muscles twitch around it. It feels good. She moans.

The doctor opens a box on the tray and reaches in, and pulls out a boa constrictor. It can smell the heritage of the mouse, and its attention is clearly on her. He puts it on her chest. It makes her afraid. He keeps rubbing.

She tries to stay still, and the boa begins to move. Its tongue tastes the air as it uncurls and moves towards her face. She closes her eyes, but she can feel it moving, and soon she can feel the caress of its tongue on her cheek.

She does not know the difference between snakes, yet. She has not yet been assigned reading on the species that prey on her feral cousins. All she knows is that snakes eat mice and some of them can kill you with their bite and she does not know if this is one of those snakes.

Her heart pounds, and her clitoris throbs, and she lets out a plaintive squeak. She does not know what the purpose of this test is, and it scares her. Perhaps they have decided that she is no longer a valuable test subject and have decided to feed her to the snake. Perhaps this is some other kind of test and she is in no danger. She does not know, and she has no way of knowing. She begins to struggle against the bonds. She tries to remember her safeword. She goes blank, and the raw physical pleasure of the rubbing washes over her like a tide of paint over a canvas that has been scrubbed raw and white. She gives in to the pleasure, because it might be her last taste of it, and she moans, and she arches, and she comes.

the doctor withdraws his hand, then the speculum, then the snake.

She is shaking on the table, on the verge of crying, tension broken from the immense wave of relief that the danger she perceived is no longer there. He undoes her restraints, and tells her she can get dressed and go back to her dorm.

She never hears the purpose of the experiment, and never sees his report, which says:

Phase III - Investigation of integration of predator fetishism into subject's sexuality

Subject: #15264

Subject was restrained without instruction. Subject was stimulated via Wartenberg wheel without instruction. Speculum was inserted without instruction. Subject's clitoris was stimulated manually without instruction. Predator stimulus was introduced without instruction. Orgasm induced in subject via manual stimulation without instruction.

Investigation performed to observe natural reactions of subject.

Phase III is progressing as predicted. Further investigative testing is recommended. Phase IV on schedule.