Old Women and Old Men
When a boy is born, the family tends to rejoice more than when a girl is born. The secular reason for this is because the boy grows up and stays close to home. He then takes over the farm or the business allowing the parents to retire… while the girl grows up and moves in with her husband's family.
The spiritual reason is that boys can do more mitzvahs than girls.
For making a vow for ones worth, the Torah gives males higher evaluations than it does for females. For instance, from when one begins his or her twenty-first year until the completion of the sixtieth year, the vowing value of a male is 50 [silver] shekels and of a female, 30 [silver] shekels.
But then, as they get older, the man's evaluation deceases by a larger percentage than the woman's evaluation. Why is this?
The gemora gives an excellent answer.[i] "People say an old man in the House is a calamity. An old woman in the house is a treasure in the house."
[i] Arachin 19 a