I fundamentally distrust people who don't swear. To me it has always signalled priggishness, timidity and conformity. People who see swearing as a sign of poor education or a limited vocabulary are, in my experience, invariably petty, snobbish and bigoted.
If I want an honest opinion, I'll ask someone who isn't afraid to speak plainly. If I need someone to help me out in a difficult situation, I'll call on someone who swears like a wounded pirate - they're not going to be afraid to get their hands dirty.
We are sacks of meat that fuck and piss and shit. We always will be. If you want to pretend otherwise then good luck to you, but I don't trust you for a second.