This shows our constant devotion to God. I don't know. But it's a tradition and because of our traditions everyone of us knows who he is and what God expects of him. It is the physical expression of an ideology. Family ideologies also play a role - the rigidity or flexibility of the family is major factor in the adjustment to new or expanded roles.
Epigenesis is a useful principle here.
Why do we stay up on the roof if it is so dangerous. A disabled child can result in a change in the reality and can certainly alter plans for the future. A couple moves from dyad to triad Boundary maintenance adjustments must be made over childhood - from preschool to adolescence the needs of the child for supervision and protection change and the family needs to acknowledge and address these changing needs. The filial crisis refers to the role reversal that occurs as the child takes over responsibility for the parent. Aging families Retirement Men loss of the breadwinner role Blue-collar workers tend to have a more difficult time with the transition than white color workers because they tend to have fewer social contacts outside of work and the restrictions of social class.