I don't believe that Everytime you should tell.
Some wifes will never get over it and feel it makes them less of a woman and you less of a man.
Some religious women it doesn't help to tell.
Women who try to compete with there peers are not good to tell.
I always weigh advice given here to be out and open with it.its not always good are ok.
I remember a girl telling me you are not a real women
,Like I was competing with her are something.