
You know this, but we'll just refresh your memory: The word gratuitous, as defined by Merriam-Webster, means "not called for by the circumstances; unwarranted."
A movie usually has a lot of ground to cover in 90 or more minutes; it must introduce characters, set up conflict, see that conflict through to its climax, and tie up loose ends if possible before the closing credits roll.
So why then do we get anything gratuitous in film? Do we really have room for unwarranted digressions? Hollywood seems to give a resounding yes. If your movie is boring, confusing, implausible, or simply not sexy enough, Tinseltown's evident solution is to throw in some gratuitous girl-on-girl action and the head-bobbing audience will perk up a bit.
This weekend, the movie Butter will open; in it we will see (in addition to amazing feats of butter-sculpting) Ashley Greene and Olivia Wilde share some steamy sapphic moments. While not strictly necessary, we're pretty sure this will make the wacky comedy a better film. Hell, it worked for these other 20 flicks. Enjoy this look back at the 20 most gratuitous girl-on-girl scenes in movies.
Jennifer Connelly and Kristy Swanson

Sharon Stone and Leilani Sarelle

Leighton Meester and Danneel Harris

Angelina Jolie and Hedy Burress

Alyssa Milano and Charlotte Lewis

Eva Longoria and Kate del Castillo

Gina Gershon and Elizabeth Berkley

Christine Taylor and Scarlett Chorvat

Dakota Fanning and Kristen Stewart

Rie Rasmussen and Rebecca Romijn

Selma Blair and Sarah Michelle Gellar

Mariel Hemingway and Patrice Donnelly

Brittany Snow and Sophia Bush

Lisa Arturo and Denise Faye

Kelly Brook and Riley Steele

Natalie Portman and Mila Kunis

Olivia Wilde and Ashley Greene

Scarlett Johansson and Penelope Cruz

Megan Fox and Amanda Seyfried

Neve Campbell and Denise Richards
