Might have been the same survey but I remember reading that married men live longer than unmarried men, though the married men were happier with the thought of death.
An old man goes to the wizard to ask him if he can remove a curse he has been living with for the last 40 years.
The wizard says, 'Maybe, but you will have to tell me the exact words that were used to put the curse on you.'
The old man says without hesitation, 'I now pronounce you man and wife.'