I'm on a train to work surrounded by six schoolboys about 15. Talking about football and swearing constantly when swearwords aren't needed.
They're all using the F word and even starting sentences with it: "Fucking ... " and then just a normal ordinary sentence. Swearing not required.
It's totally pointless and boring to swear when swearwords aren't needed. If I use swearwords it's in context - extreme anger, shock etc. Otherwise it loses its currency.
And why is the F word the only one people think of? I've heard people say it's a symptom of a lack of vocabulary and always disagreed because of swearing stuffed into a sentence at random. But I'm now inclined to agree as nobody seems to know any other swearwords!