IF YOU SPENT A LOT OF TIME ON THE EARLY INTERNET MAYBE THIS WILL HELP YOU UNDERSTAND WHAT THOSE WHO DISLIKE SWEARING EXPERIENCE WHEN THEY HEAR PROFANITY

Now, why they react that way is a lot more complicated... Much like why I and many others find the above almost physically painful. My own personal take is that avoiding swearing in public, like avoiding all caps in the Internet, is a matter of courtesy and respect for others. And while I find the discussion of why interesting, ultimately I believe that respect for oneself and others (something I have watched diminish for decades) is a good thing, and ought to be practiced. It's... being a good citizen and fellow human being, I guess.