VERY LONg tease (3-4hr). Possibilty of multiple ruined orgasms, POT/milking, or a full orgasm (if you have impressive self-control). [If not using a fleshlight adjust speed of strokes appropriately.]
Your girlfriend is finally planning on letting you fuck her today. But not until you prove that you will perform well enough to satisfy her during sex. Pass the test and she just might fuck you.