Social influences from parents, peers, and media can encourage gender-stereotypical behaviors in children from a young age. Parents often model and reinforce behaviors that are considered appropriate for the child's gender. Peers also punish behaviors that are not typical of one's gender. Media portrays gender roles and stereotypes through television, magazines, and films that children are exposed to. However, cross-cultural research suggests that what is considered gender-appropriate varies across cultures and has become more flexible in Western cultures over time.