It's a tough subject to deal with the differences in your spouse, without fighting.  As adults, we're set in our ways and do not handle criticism well or imposed views other than your own. Fighting between couples arise from insecurities and immature behaviors.

Men tend to point the problem...and fix it no matter what. Some women would rather discuss the issue and seek out blame, rather than resolve the problem. Consequently, fighting takes place because it becomes a match. A match where someone must loose, and the other wins.  Men are practical creatures, where some women tend to be objective emotionally to discuss marital problems.

We need to try to meet in the middle more often...