.Science
Almost Before We Spoke, We Swore
"Some researchers are so impressed by the depth and power of strong language that they are using it as a peephole into the architecture of the brain, as a means of probing the tangled, cryptic bonds between the newer, 'higher' regions of the brain in charge of intellect, reason and planning, and the older, more 'bestial' neural neighborhoods that give birth to our emotions.

Researchers point out that cursing is often an amalgam of raw, spontaneous feeling and targeted, gimlet-eyed cunning. When one person curses at another, they say, the curser rarely spews obscenities and insults at random, but rather will assess the object of his wrath, and adjust the content of the 'uncontrollable' outburst accordingly."