Actors Colin Firth and Laura Linney were seen filming intense scenes for the upcoming movie adaptation of the influential sex manual, "The Joy of Sex." In a dramatic portrayal of a domestic dispute, Linney, playing Ruth Comfort, was filmed throwing Firth's character, Alex Comfort, and his belongings out of a window.

Firth, dressed in a suit, shielded himself from falling items, including shirts and books, as filming took place in the UK. Linney, wearing a red blouse and pearl necklace, was visible from the window.

The film, working under the title "Comfort and Joy," is directed by Sharon Maguire, known for "Bridget Jones's Diary." It delves into the complex relationship between Alex Comfort, his wife Ruth, and his mistress Jane Henderson, portrayed by Julianne Moore. This unconventional 'throuple' dynamic formed the basis for Comfort's groundbreaking 1972 manual.

"The Joy of Sex," written by British physician Alex Comfort, became a seminal guide to sexual relationships and health, offering a candid and sex-positive perspective that was revolutionary for its time. The book was characterized by its open tone, detailed illustrations, and exploration of various sexual practices.

Julianne Moore's character, Jane, is depicted as a librarian who became Comfort's lover and collaborator. The film's narrative explores the decade-long intertwined relationship, which eventually led to Alex divorcing Ruth to be with Jane. While Alex reportedly found fulfillment in his relationships with both women, the source material suggests Ruth and Jane experienced unhappiness within the love triangle.

Nicholas Comfort, the son of Alex Comfort and the holder of the film rights, is serving as a consultant for the production. He has expressed enjoyment being involved in the process, which began discussions about the movie nine years ago. The film aims to capture the essence of the manual, which was structured like a cookbook with sections such as 'starters,' 'main courses,' and 'left-overs,' and aimed to empower couples to explore their sexuality.