That's the premise for Charlie Kaufman's Oscar-winning script for Eternal Sunshine of the Spotless Mind. Since her procedure, he has been using Joel's and Clementine's memories as a guide for seducing her. A notable example is the ocean washing away the house in Montauk; the production team accomplished this by building the corner of a house on the beach and allowing the tide to rise.

Eternal Sunshine of the Spotless Mind - Bloomsbury Publishing Eternal Sunshine of the Spotless Mind - Bloomsbury Publishing

His mental projection of Clementine suggests that Joel hide her in memories that do not involve her. F rom page one to the final scene, Eternal Sunshine of the Spotless Mind holds a magnifying glass to the intricacies of human connection. Time Out summed up their review by saying, "the formidable Gondry/Kaufman/Carrey/Winslet axis works marvel after marvel in expressing the bewildering beauty and existential horror of being trapped inside one's own addled mind, and in allegorising the self-preserving amnesia of a broken but hopeful heart. To this end, Kaufman made sure to keep the story realistic and true, so that the film did not rely only on its unusual structure. The film stars Jim Carrey and Kate Winslet, with Kirsten Dunst, Mark Ruffalo, Elijah Wood, and Tom Wilkinson in supporting roles.You see all that manic comic energy imprisoned in this ordinary man, with the anarchism peeking out and trying to find a way to express itself. Kaufman's script and the prospect of working with Gondry also proved to be an attractive combination for Mark Ruffalo and Elijah Wood, who took on smaller roles than they were generally playing at the time. They also receive packages from Lucana, which contain tapes from their respective sessions in which they explain why they want to erase each other. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. In that way, Clementine may be “gone,” but we know their love has changed Joel, and that he will never let her go.

Eternal Sunshine of the Spotless Mind - 1st Edition

He had an "enormous struggle" while writing the script, particularly encountering two problems: showing "the memories, Joel's reactions to the memories, and Joel interacting with Clementine outside of the memories in the memories," and the fact that characters could refer in later scenes to already erased memories.

The thing is, and this is my personal note, memories exist for a reason, not only for humans but for any other species of animal.