Looking through my collection of 80's magazines I saw a review of a Joan Wise video (this isn't in the video section as I don't know if it's still available) of a fight between a blonde called Kitten and Margo, a brunette. After some struggle Kitten got Margo on the floor and sat on her face, with her crotch on Margo's mouth. The brunette was, according to the reviewer, clearly revolted by this, constantly squirming, though with no avail. Kitten added to her opponents distress by pulling on her thong to give her a really good wedgie, and was getting excited. So much so that, with her crotch still on Margo's mouth she tells her it's not sweat but cum that's emerging. Margo surrenders and Kitten makes her crawl round the room, leading her by pulling her hair, then mounts her face again. Eventually she releases the brunette and fingers herself while a distressed Margo cry's "You're disgusting!"
I've uploaded the picture from the review, which isn't the greatest quality, but still worth seeing.