"Dirty Mouth? Clean it up with Orbit Gum"

I think when an author uses obscene language, it is not randomly put in there, I think it is strategically placed to either set a mood, or show the strong motions of the characters. When obscene language is used, a lot of times it is through dialogue. When a character is very emotional whether it is upset or angry, they tend to use these words as a way to show the reader how emotional they really are. Honestly, I do not mind obscene language in books as long as its is not like every other word. There is a definite line between effective and not effective, and when an author continually uses such bad language, readers lose the purpose of the book because the language is so evident.