Did you know that different hand gestures and signs have different meanings in different cultures? For example, the "thumbs up" gesture, which is a sign of approval and positivity in many countries, is actually considered offensive in some parts of the Middle East, such as Iran, where it's interpreted as a vulgar insult. Similarly, the "OK" sign, made by forming a circle with the thumb and index finger, is widely used to indicate something is good or acceptable in Western cultures, but it's considered highly offensive in some parts of South America, where it's interpreted as a symbol of a certain intimate act.