Mad Scientist

In this game, the dominant is the evil mad scientist, and the submissive is his helpless experimental victim. The mad scientist (who for effect can be wearing rubber gloves and a disposable laboratory gown) has the subject tied to his examining table deep in the heart of his laboratory, and can perform all manner of experiments on her. He might, for example, probe her in various places using any one of a number of suitable laboratory instruments (vibrators are good for this). Perhaps while he's doing that, he might put clothespins on her nipples, to see how they respond to compression. Maybe he'll want to experiment to see how long she can be stimulated without being allowed to climax. He could keep her there through the long hours of the night, conducting endless experiments to find out how many times she can climax, or how large a probe she can accept, or how deeply she can be penetrated...you get the idea.