Even though the movie is in pre-production, "Black Swan" is getting press because Natalie Portman and Mila Kunis have sex, and according to a script review site, it isn't for the faint of heart, it's "We're talking ecstasy-induced hungry aggressive angry sex." Written and directed by Darren Aronofsky (who directed "The Wrestler"), the movie deals with the melodramatic lives of New York ballet dancers working on Swan Lake. [Celebuzz] Why do ballet dancers in movies only do productions of Swan Lake? But more importantly, why are there so few lesbian scenes in movies? We look back at the women who paved the way for this upcoming cinematic achievement.