Funnily, though I have a naturally sarcastic personality and frequently (and unintentionally) confuse people with my tone, I also have trouble sometimes persuad

Funnily, though I have a naturally sarcastic personality and frequently (and unintentionally) confuse people with my tone, I also have trouble sometimes persuading people that I was not being sarcastic when I say something plainly. I think it has to do with some statement I've made being so outside the norms of what they find acceptable that for them it is only understandable as sarcasm. And this sort of thing happens both with written and oral communication, unless I really focus on providing facial and other body language clues as to my intent, which I find to be somewhat annoying. I am, after all, of Scandinavian extraction, and excessive emotional expression is not only frowned upon culturally, it has also been systematically bred out of my genetic code for dozens of generations.