Each Zodiac sign rules over a part of the body. When we have a specific sign prominent in our chart the body part that it rules over affects us and we may or may not notice its influences in our lives. Believe me when I say there is an influence and it can be large.
The Sign Cancer rules over the hands. People with Cancer prominent in their charts find it very easy to work with their hands and often work as craftsmen. They also make excellent typists.