Boundaries do not exist to the same degree. One can be a student and also avail of worldly pleasures. Retirement does not equal giving up attachment and renouncing worldly pleasures, rather viewed as the time to relax and enjoy. One grows wiser with age, old are respected and treasured. Usually cared for by the family.
Old age is cherished as time to work toward salvation.
Youth is valued. Old age is viewed as a time of losses in intellect, health, wisdom, etc. It is important to put the benefit of the child ahead of the couple. Marriages are made in heaven. One does not have to be in love before deciding to get married.