TWO neighbours have entered into a bitter note exchange over loud sex.

One person who lives in an apartment complex in Chicago posted a message on the door of 517 trying to shame their neighbour for making too much noise.

But instead of getting embarrassed, "the girl in 517" hit back with another note accusing her neighbour of being too uptight.

A third neighbour saw the exchange, and posted it online.

The first note reads:

Could you please put a record on super loud or something when you are f***ing?? I'd really appreciate NOT having to hear every single trust [sic] and moan right through the f***ing wall. And I'm sure you'd rather not share that info with complete strangers. Luckily for me, it never lasts very long.

The response:

Dear Neighbor,

My, my! How lovely to meet you in this incredibly tactful, kind + civilized manner. Did you really need to post your hissyfit on my door like a whiney scarlet letter? Your obvious frustration from my pleasure saddens + confuses me. I'm not yelling, or anything terribly disrespectful. Apparently, we have the thinnest walls on Earth because - I assure you - the moans you're so upset by are masturbation induced. That's why it "doesn't last very long." I know what I'm doing and porn is free, + I have the best vibrator. I got it at Taboo Taboo down the street. You should really invest in one - you sound a bit, uh, tense ... SEX IS NATURAL & HEALTHY. I am proud of my sexuality, so your attempted SL**-SHAMING is useless here. Had you approached me in a respectful manner, I would have been happy to oblige. But we all know our rent is exorbitant. I pay enough to do whatever I please in the privacy of my own home. AND PLEASE I SHALL! I suggest you whip out your big girl panties and deal with it. Much love! The girl in 517

The Huffington Post got in contact with the Reddit user who posted the picture, who said there have been no new notes posted since the image was put online.

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