Cancer, the first cardinal water sign of the zodiac, can be a puzzling sign. As a cardinal sign that begins at the summer solstice, Cancerians are leaders, but they lead indirectly and are masters of innuendo and sly sexual clues. The sign's ruler is the Moon, which influences the ocean's tides. Familiarize yourself with the lunar cycle, and you will have the inside track on a Cancer's highs and lows. She is motherly and cranky; nurturing and selfish; humorous and moody; highly sexed, and then quickly turned off if something frightens or disturbs her.