What is the origin of the idiom "give one's right arm" and when to use it?

The idiom "give one's right arm" likely stems from the idea that the right arm is typically associated with strength, skill, and dexterity, especially for right-handed individuals. Therefore, offering to give up one's right arm symbolizes an extreme sacrifice or willingness to give something of great personal value. This expression can be used in personal contexts, such as expressing one's willingness to make a significant sacrifice for a loved one or to achieve a lifelong dream. Additionally, it is commonly used in professional settings to highlight a person's strong dedication to their work or their willingness to go to great lengths to achieve success.