I think this has nothing to do with age and everything to do with wisdom. Even as a 15 year old some know better than to hide basic facts about their lives or not to get serious with someone that isn't serious material.
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If he is recently divorced, why would he be interested in quickly remarrying? Divorce can leave a trauma making someone lose all interest in the illusions that accompany marriage, making it just seem like a signature on a paper that can be turned against you