There’s a reason “Hey, bb, what’s your sign?” has been a way to flirt since your grandma’s days. Knowing someone’s sign gives you a clue into your astrological compatibility-aka how well you
romantically and sexually. If you ask an astrologer about compatibility, they’ll want to see your and your boo’s entire birth charts. Your Moon, Venus, Mars, and Mercury signs play a major role in compatibility-not just your Sun sign.
Still, while it’s not the whole astro story, your and your crush’s Sun signs give you some info to go on. In astrology, each sign has an element (fire, water, earth, or air), a modality (cardinal, fixed, or mutable), and a polarity (masculine or feminine).