There was a comedian that hit it on the head. He said something to the effect of this..
Men marry women for who they are.
Women marry men when they not for what they have, but what they can be. So a couple gets married and she starts to change him. She works him over, changing who he is. She nags, he withdraws. Pretty soon he just gives up.
Then one day, she says to him.."You just aren't the same man I married."
(sigh)