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It is the same for me - easier to know your audience when they are in front of you, and something about what is said not being recorded on a chain, forever :)

Loosen up you wanker

Lol! Hey that might be a good post series/competition. ROAST A WHALE.
It would allow people to vent frustration towards the big wigs around here and conversely, give some insight into what possibly those big wigs could improve upon.
Very community orientated either way.

Making positive strides for the next time this post appears!

I try to be formal but there’s lots of good scenarios where a ‘shit like this’ has more of an effect than “you could do something like this” hehe. I have improved in my vulgarity though!

I think that's mainly why most people use expletives: for emphasis or to quickly express their opinion about a topic or person. Which is fine, when you know it won't offend your audience.

We also use them more often when we're trying to motivate an action by engendering an emotional response (because expletives are often triggers for our emotions), rather than create a discussion around the pros/cons of an issue. I think there's a time and place for both approaches to communication.