All this guys are doing research on this and it is been proved in India culture ages ago, and hence we find bride younger then groom and so on in Indian culture but the problem with us is we need a white skin to tell us.
The same as happened with lot of things like fruits, it is been told in ayurveda that we need to eat food only in morning but it has to be proved by some scientist in the west now we will believe.
Wake up India; we are far superior then this ediots.look into out culture and history rather then looking into the religion.
Depends on the type of guy too. I think the perfect wife is one who is smart but gives a boost to the man's ego. Makes him feel smart - best way to keep an indian man. If the Guy needs a mommy then the formula given above is true. On the other hand If the guy is hot headed then a girl who is calm, tolerant or socially disadvantaged who will stand his temper!