What is it with vulgarities?

It is just something that I thought of today when I was browsing through some home made youtube videos. Someone please enlighten me about the use of vulgarities, more commonly the f-word. Why is it that more and more people are using it without inhibitions? I see that it is a way for one to release emotions through swearing but does not it defeat the purpose when you use it too often? Strange... I am open to comments about this (no harsh words while commenting please:))