If you can find a porn actress with a similar body type/physique, engaged in interracial sex, then coax her, use her imagination to place her in the role of the actress, to pillow-talk the scene with her, it can sometimes encourage her to want to place herself in a similar role.
Another technique is to use still images - same idea, actress with a similar body type, even better if you can create a strong facial resemblance or face-swapped image/series of images. Captioning can add a dimension - a short narrative of the fantasy to go with the image(s). I know of a few guy's that used my captioned work in the BBC seduction process...
The trick, video or otherwise is to get her imagination engaged, such that she grows increasingly thoughtful about such a situation. A BBC dido as companion is also useful.
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