If one person has the Moon in Taurus and the other has the Moon in Sagittarius, many would say this is not a good match because the signs are quincunx. But, if the Sag Moon aspects Venus and the Taurus Moon aspects Jupiter then these two have more in common than was first apparent. If, on top of that, both Moons are in the 5th house then these two seemingly “incompatible” Moons actually have a great deal in common.
Aspects from other planets to the Moon do not have to be identical in each chart. One person may have Uranus square the Moon while the other has Uranus sextile Moon. The square person brings inner tension to the relationship while the sextile person brings easy energy. If handled well, the person with the sextile can demonstrate to the person with the square how to use his energy with less stress.
It can help if each person has a planet in the same sign as the other person’s Moon- then the sign expression is represented in both charts. The Moon shows what we need to feel emotionally satisfied. If one person has Mars in Scorpio while the other has Moon in Scorpio then the Mars person understands what to do to make the Moon person feel satisfied. They don’t need to have the same Moon sign. They don’t need to feel the same way to meet the other’s emotional needs. The Moon person instinctively understands why the Mars person acts the way he does and how it is that he asserts himself while the Mars person knows just what to do to make the Moon person feel better.