Swearing

Why do firemen in general like to swear? There are a few particular ones, swear on every single sentences. Just loves to use the f— word. I got so stress out listening to them. Thank God they only come once awhile. I think swearing make them feel that they are in power and manly. If they are angry, I can understand they have to take out the frustration, but, they aren’t angry at all. I hope I'm not going to be like Kevin, picking up the BAD habit! Got to be strong! = (