I don't swear. I used to swear quite frequently, but then I realized that I just sounded like an idiot. I find swear words are like verbal violence. Violence as an answer to a problem or issue is a poor man's response. If a guy is mouthing off and you slug him, it just shows you lack and willpower, restraint, or ability to either combat him verbally, or just realize the guy is just some guy mouthing off (And therefore just some idiot)...so who cares?
Swearing is the same. It portrays an inability to articulate yourself properly. Now, before the quotes pour in saying 'I can articulate myself just fine and I swear!', then allow me to point out the qualifier word 'portrays'. I know there are plenty of articulate people who swear plenty, but it's hard to take them as serious, intelligent people when their vocabulary seems to be restricted to 4 letter words.