When people use the word shit or other foul words to call something by its name, it is because they do not know what is going on. Bad up brining and mentally challenged, with no idea of the Dead Horse Theory, just hope for things without knowing.  

The use of obscene or taboo language - or swearing, as it’s more commonly known - is often seen as a sign that the speaker lacks vocabulary, cannot express themselves in a less offensive way, or even lacks intelligence.

Studies have shown, however, that swearing may in fact display a more, rather than less, intelligent use of language.