in many leftist stories "sex" is a metaphor for being subject to the whims of the powerful bourgeoisie, however Orwell was an anarchist and was more interested in individualist subjectivity (which sees consensual, non-exploitative sex as liberation) than systemic critiques where characters symbolize broader class relations.
orwell wasn't an anarchist, he was a lib/trot who ratted out communists and anarchists to the British government
https://bennorton.com/george-orwell-list-leftists-snitch-british-government/
he fought in the spanish civil war but didn't want the communists and the anarchists to win