The captain of the team should be the first to practice and the last to leave.

Acting a certain way because you have a certain title and responsibilities that go with that title.

Brides wear white on their wedding day.

Being obedient to and caring for your parents. 

Doing the dishes and taking out the trash for your parents.

Asking if you can help your grandparents.

Parents should make the decisions about a child's bedtime, not the child.

Send flowers and a condolence card, maybe food, to the family who has a family member who has died.

Certain ceremonies are carried out in a certain manner.