The Moon is the most important 'planet' in relationships. The Moon represents deep security needs, and it is difficult to be with with someone who does not offer us what our Moon needs. Positive Moon compatibility will show two people who feel "at home" with one another, and instinctively care for one another. It's like being family. That's why it's the most important planet in synastry. If you want to spend the rest of your life sleeping in the same bed as someone else, you obviously need to feel like family to one another.
Moon Sextile Pluto
Your relationship will feel profound, intense, fated. You may find that when you are together irrational energies, long buried deep within you, come into play, giving you opportunities to resolve what seems like all your emotional relationship baggage from the past. With the Moon person sextile the Pluto person, your presence will trigger intense connections both physically and spiritually. At the same time every traumatic romantic or relationship issue you partner ever had will seem to erupt. This is an opportunity to clear up and heal the past, no matter who the original players were.