BONUS:How do you know what sign someone is without asking? Or if not how do you bring the conversation up?
You look to your instincts instead of logic and facts. You are empathetic, intuitive and honest. You go with the flow and choose not to fight the current.
Perfect match: Cancer, Scorpio
Almost perfect: Taurus, Capricorn
Opposites attract: Leo, Libra
Signs to learn from: Aries, Aquarius
Not your destiny: Gemini, Sagittarius
To know what sign someone is you need to know the birth date. To know rising and moon sign of a person you need to know the date, place and time of birth, which requires a lot of asking :). Btw why would you want to know the sign of other person. I think you want know beforehand that whether that person will get along with you or not. Even if you know their sign you can not ensure that because that does not give much of information, it depends on the whole chart.