Men marry women with the hope they will never change. Women marry men with the hope they will change. Invariably they are both disappointed.

This quote is suggesting that men and women have different expectations when they get married. Men tend to hope that the woman they marry will not change anything about who she is, while women tend to hope that the man they marry will change in some way. However, in the end, both men and women are usually disappointed to find that their expectations have not been fulfilled.