The people who cannot spend energy to control themselves and therefore curse are less prone to using self-control-dependent strategy of lies and deception. Wowsers.
I don't swear because I lack self-control. I swear because those words are powerful and useful. "Bullshit" is an immeasurably better word than any of the alternatives. Some people are entirely deserving of the label "arsehole" or "bastard". 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 limi…
One of my previous superiors sweared a lot, but when there was something to clarify the conversation took another route. I could ask him a question and then he would freeze and not even a sound would come out of his mouth. The silence could take such a while that I would start to think that maybe he haven't heared me. Then he would slowly and steadly respond - usually not needing to stop midsentence to reformulate (as I usually do). Those calm responses usually did not contain swearing. There where a few colleagues that would just not stop talking until he would respond and then he would tell them to shut up.