The last flight I went on you had to pay for headphones, so I told them to fuck off and then the flight attendant got mad at me
A simple "No thank you" would have been a lot better received I'm sure. The attendants are just doing a job how would you like to get told to "fuck off" when you're doing your job?
Most planes have normal 1/8" stereo headphone jacks now, those that don't use a standard 2-prong 1/8" mono jack setup (one for left, one for right).
It really is pretty loud in the plane, I used to put earmuffs over my earbud headphones to cut out the noise, it made the trips much more enjoyable.