There is another resaon why men prefer to marry younger woman.. They assume that the older the woman gets, the less likely she would still be chaste. I suppose you are well aware that a woman's chastity and purity is a major issue in our society so a woman in her last teens or early twenties is inexperienced and probably did not get much exposure to the real world but the older a woman gets, she becomes more independent and more likely to have few dating experiences and failed relationships.. Men do not want that, they want a pure white virginal woman.. Hence the trend of marrying very young girls just out of school..