Profanity is very subjective!
I would disagree slightly, in that the thing that is subjective is what you find acceptable to say - that particular word is a swear word, whether or not you find it acceptable. I find it acceptable to drive at 35mph in a 30mph limit - doesn't make it legal though.
The majority of swear words have sexual links, and this is no exception.
I understand what it is you are saying, however I stand by my original statement in that it really does depend on where you go, as different areas have definite differences of opinion about exactly what words or terms are socially acceptable. I understand the need to police these things in public areas as well.
Subjectivity is that different words mean slightly different things depending on where you are, and what the subculture you belong to finds acceptable. Having been around the world at least twice, it is a very real thing.
In reference to the sexual nature of swearing, I disagree. To a large degree you are correct, however there is also a strong association with "filth" rather than sexual material. As just as many cultures use implications of "uncleanliness" (literally "dirty" or references to feces or waste) as their profanity.
Personally, and I think I not alone here, never considered that particular word sexual in nature. I always assumed that it referenced something bothersome or annoying, I.e. Something specific that "bugs" you. Which I just never really though of as profane.
Anyway, I didn't consider it a "curse" or swear word, as I never really thought of it as being particularly insulting or degrading, or even "strong language" as I always thought it referenced a minor annoyance. And it sort of surprised me that it was on the verbal no-no list enough to get censored.
I accept that it's outside the rules HERE, but it just surprised me that it would be... It wasn't a case of trying to do 35 in a 30 zone... It as more appropriate to say "I was driving cautiously I just didn't realize the zone was 15 because the road sign simply said "caution"