I used to curse all the time and found nothing wrong with it. Once I realized that Christ commanded me to stop doing it, I adopted the practice of making small ejaculations as an Act of Contrition immediately after uttering, or even thinking, the profanity or blasphemy. Over the course of months and years, I have been cured of cursing and I almost never do it anymore. Certainly not out loud, or in public.
I really don’t associate on a regular basis with people who curse. If someone approaches my circle of friends, for example when we are playing cards in a café, and begins peppering his speech with epithets, I kindly ask him to temper his language while he is around me. Most people are more than happy to comply and very apologetic.
I was once on a small bus when a very stinky homeless man deboarded, and immediately another rider began deriding him in an extremely profane manner. I informed him that I found his language more objectionable than the smell of the homeless person, and he tore into me, challenging me to a fight and threatening violence. I was forced to exit the bus for fear of escalating the situation. That pretty well describes people who use profanity and then become aggressive when challenged to stop: they are rude, violent, and don’t care what others think of them. One more good reason not to use profanity in any situation whatsoever.