Expressing inner dissatisfaction for children, the expressive ability of language has not been fully developed, so it is often impossible to fully express it. Imitate others' words and deeds: children have strong imitation ability. When children first came into this world, everything was in the learning stage. Tourette syndrome in children.
When children are young, swearing may be imitation, but as children grow up and become more sensible, they will naturally stop swearing.