Fado: Portuguese Sad Music

Fado is the Portuguese folk music that sounds super sad, mournful, dramatic and tragic. It's a really old genre, but there are modern Fadistas, like Mariza:

This Fado song is called Primavera. (Note that I've posted a song called Maledetta Primavera) Check out the words! So sad! Why is it so good to hear such sad music sometimes? It is good, isn't it? 

It kind of makes the blues sound happy. I'll be on the lookout for some really sad blues next. Fado can't seriously beat the blues at being blue, can it?