Some people curse for emphasis, and I am one of those people. As an old English major, i hold to the belief that words are just words, and only have the power we give them. I always have to be super diligent when I am presenting in public, because the odd swear word occasionally appears, and I have heard from the people who were offended by that.
It turns out, according to the BBC, that swearing has a pain-relieving effect, whether physical or emotional.
Here is another reason for cursing that I can endorse. From Pinterest.