My ___________, just doesn't understand!!!

In conversation I heard this line..."my mother just doesn't understand." Later from the mother I heard this line..."my teenage daughter just doesn't understand."  It struck me that neither was going to understand and they were going to get more frustrated the more they tried to reach the level of understanding they each so desired.  There are somethings mothers aren't going to get. There are just somethings teenage daughters aren't going to get. They are different people with different experiences and will approach the same subject with different perspectives. Both of these women were very upset with each other and they needed to each respect the others postion no matter their own view of validity. This is what has been called the generation gap but I think there is more to it. 

You can say things to your same sex best friend that you can't say to your spouse. If you are a man, your best friend will understand your viewpoint if you comment on a woman (other than your wife) that you find sexy. Your wife probably won't.  If you are a woman and are upset about anything, your best friend will listen and be sympathetic. Your husband will always think you are looking to fix something and not only will advise you, he will be upset if you don't take his advice. 

My thought was that maybe there was a limit to what any one person could understand. Sometimes we need to accept after repeatedly stated all the facts of our position is that the other person is not resisting our persuasive argument, they just have a different perspective. We need to consider who they are and where they have been. Many times we walk away thinking the other person doesn't care and that might not be so. Sometimes we just need to agree to disagree.