Complex sentence: Beauvoir presents a child's life beginning with birth, contrasting a girl's upbringing with a boy's, who at age 3 or 4 is told he is a "little man".
Split into simpler sentences: Beauvoir presents a child's life beginning with birth. She contrasts a girl's upbringing with a boy's, who at age 3 or 4 is told he is a "little man".