In the legendary 2001 lesbian hardcore film “Sugar High Glitter City,” there is a scene where a naked femme wriggles on a pool table while two butch women play with her body. Before long, she’s ... visibly ejaculating on the green felted fabric. A few seconds later, it happens again: A stream arcs forth in such an impressively forceful way it causes the woman penetrating her to break with her tough character and let out an innocent, awestruck laugh.

“In this particular scene, we were subverting and perverting the traditional pool table gang bang,” Shar Rednour, the film’s co-director, tells me. “In the traditional flicks, the woman gets penetrated then the men come visibly all over the place.” In their film, it was the woman who was visibly coming all over the place.

And t...