[marliechiller]

Why would you want a 20 year old wife at age 50. The maturity gap would be almost unbridgeable. The only benefits are sexual and even then the maturity aspect might play a part. Even in my late 20s, the idea of someone who has just left their teens would be deal breaker

[tokai]

A surprising amount of people don't mature at all between 17 and 57.

[AdrianB1]

If a man at 50 wants to marry, it is usually because he wants kids, otherwise there is no reason to get married at that age. If he wants kids, the woman must be in the fertility age, which is 15 to 35, with the best bet in the 20-30 interval. Just biology. Yes, the maturity gap is big, but if that is the price to pay to have kids ...