When people are trying to create new friendships or relationships, they might ask each other about favorite movies or music. They don't always think to ask about each other's birthdays or astrological sign. For Cancer, or anyone interested in a Cancerian, it's useful to know which signs form a natural bond with this water sign - and which ones might create a hurricane of drama together.

If you know which astrological signs fall under which dates, you're already well on your way to being able to figure out how compatible Cancer is with the twelve astrological signs.

• Cancers are born from June 21 til July 22.

• Cancers are moody, intuitive, nurturing, and withdrawn.

• Cancer's worst matches are fire and air signs.

• Cancer's best matches are earth and water signs.

• Cancer's polar opposite is Capricorn.

Compatibility between astrological signs is some of the most basic astrology around. Once you comprehend what is typical of other signs, understanding the compatibility between them comes naturally. If you've never read a horoscope or know nothing of astrology, it wouldn't hurt to brush up on the twelve signs of the zodiac first. To understand Cancer's compatibility specifically, understanding the traits of their sign is required.

Know who's a Cancer, and what makes them tick. Anyone born from June 21st until July 22nd falls under the sign of Cancer. They're the fourth sign of the Zodiac, a cardinal water sign, represented by the crab and ruled by the moon.

Typically, they are moody, manipulative, insecure, nurturing, family oriented, intuitive, maternal, expressive, and reluctant to share their feelings. They often hide inside their crabby shell, waiting for someone to come along who can bring out their softer side.

As a water sign, it should be no shock that there isn't a lot of harmony between Cancer and the fire signs. Aries, Leo, and Sagittarius can all create upheaval in Cancer's world. Their brash, head forward approach in friendship and relationship does little to coax Cancer from their shell, but instead sends them crawling deeper inside to escape from words and observations they find to be too harsh. A fire sign interested in Cancer needs to learn to hold their tongue if they want to stand a chance with this water crab, or they might find a sharp pincer claw clamped down on it instead.

Air signs, though they can share much in common with Cancer, aren't the most compatible out there, especially Libra. Air signs are often determined to be objective and rational, which can cause problems with the emotional and subjective Cancer. Cancer wants a shoulder to cry on, not an intellectual discussion debating why maybe their boss had a good reason to yell at them at work. That's not to say Cancer can't understand reason and logic, but only after a good cry.

The steady dependability of the Earth signs - Taurus, Virgo, and Capricorn - speaks to Cancer. Practical and domestic, Cancer gets along easily with all of them, with one exception. A Capricorn can, at first glance, seem an awful lot like Cancer with their tough shells, except Capricorns have no shells at all. They're like that all the time. Cancer finds it hard to understand their emotional detachment and calculating ambition, but if they're willing to be patient with each other, sparks can fly as these opposites attract.

But it's no surprise that in the end, water begets water. Cancer, Scorpio, and Pisces share a natural connection in their shared element and relationships flow easily between them. Whether blending together with their own sign, sharing in exceptional loyal bonds with Scorpio, or enjoying the emotional rapport with Pisces, it is here that Cancer is most compatible. Anyone not lucky enough to be born under a water sign can take pointers from these signs if they'd like to win over a Cancer's heart.