中 Both language and culture are learned by children without special organized programs of instruction, but motivation to learn is very high since language is the most effective means for a child to obtain what he or she wants. If the learning of a new language begins before lower adolescence, one is likely to be able to speak such a language with complete naturalness, but if learned after upper adolescence some hangover of a mother-tongue feature is very likely to persist. But not only do languages exhibit such learning patterns, but so do cultural traits, for example, shaking hands, kissing, and embracing. Although many persons assume that languages exist in dictionaries and grammars, in fact they only exist in people's heads. But this is equally true of cultural traits, which indicate clearly a they only exist in people's heads. But this is equally true of cultural traits, which indicate clearly a person's value system when crucial decisions need to be made before there is any time to think about alternatives, for example, diving into a flooding stream to rescue a drowning child.