Funny Joke: Why did you have to die?

A man visiting a cemetery heard a second man who was kneeling at a nearby grave crying-out loudly, "Why did you have to die?!!? Why did you have to die?!!?".

The first man was so moved by the other man's obvious pain, that he walked over and lightly placed a comforting hand on the distraught man's shoulder and asked him, "Is this your wife?".

"No", replied the weeping man, "Her first husband!"

l didn't get the joke. What is the connection with the dead person and the man crying?

Hahahahahahahahahaha

this is funny.

If your wife is troubling you, poison her!

  this joke is not complete at all, cos i cant get the info