Moon Conjunct Mercury love Synastry ~ Mutual Expression
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 Conjunct Mercury
Your feelings and your partners thinking are highly compatible with one another. Ideas are part of your romantic bonding and you can often feel each others thoughts and ideas and reflect them as though they were a part of you. When the Moon person is in conjunction with the Mercury person, they are very receptive to your ideas and willing to listen to you express them.