"We don't know how long the Dagwood-sandwich structure would exist. This structure represents a stable state, but various factors could mean the moon doesn't reach this stable state," Dr. Christophe Sotin said in a May 1, 2014 statement. Dr. Sotin is of the JPL.
The astronomers observed this effect in the upper layer of the lunar crust, termed the megaregolith. This layer is heavily pockmarked by relatively small craters, measuring only 30 kilometers or less in diameter. In contrast, the deeper layers of lunar crust, that are scarred by larger craters, appear not to have been as badly battered, and are, therefore, less porous and fractured.
This does not mean that soul mates must always have strong lunar contact in their birth charts. The compatibility between Moon signs is another important factor. Each of the 24 possible combinations (for example, his Leo Moon combined with your Aquarius Moon, or your Virgo Moon combined with his Sagittarius Moon) presents its own emotional chemistry. It's certainly true that compatibility can take many forms. Nevertheless, in determining whether two people are a perfect match, the Moon is one of the first places any good astrologer will look. Beyond just a physical or intellectual attraction, lunar energy signifies a deep and psychic bond between lovers.