Having the man be older than the woman, is an artificial cultural tradition. But then on the other hand, the idea of marriage itself is an artificial cultural tradition.

The main thing I have come to focus on with this general subject, isn't the age or physical characteristics of the people involved. The formative element in human relationships, is what each person is truly dedicated to. Those who are dedicated to each other, AND to making their joined lives positive, will tend to be alright come what may. Those who only THINK they are dedicated to each other, but who are really only dedicated to "having a good time in their own heads," will not be.

I would note one thing in particular: if you find that you are looking for a mate who is of a certain age, ONLY BECAUSE THEY ARE OF THAT AGE, then you are deluding yourself, if you think you truly love them.