1. Different cultures interpret gestures and body movements differently, which can lead to serious consequences when interacting with foreigners.
2. Children around the world learn to count with their fingers; the method of doing so varies (Americans use their index finger for "one," Europeans use their thumb, while the Chinese have specific hand positions for numbers), making communicating about quantities challenging.
3. Many cultures consider simple actions like the thumbs-up, pointing, and even "come here" to be polite, while in other regions these may be viewed as rude or completely opposite.