Theoretically, in a synastry, two people coming together with this aspect should facilitate one another in this way. There is an understanding between them. They feel comfortable together, complimented. They like one another. This works even in compatible elements (fire/air, earth/water) without an exact aspect, although the more exact the aspect, the greater the integration. In theory, at least.
Ever had a non-sexual relationship with someone whose Sun was conjunct your Moon, or vice versa? A friendship perhaps? Work colleague? Ever notice what happens? Usually, you get along okay, sometimes fabulously. You like the same things, you have the same attitudes, you feel comfortable with one another. You have fun together. But then, what happens? All that same-y stuff runs down an unconscious river between you. Pretty soon, you don’t notice it anymore, and then that’s when the conflicts of other planets kick in. And that wave of unconscious nicey-nice-ness that you were relying on suddenly turns on you a bit, because you find that the same qualities you really don’t like in yourself are reflected in the other person, like a bad mirror staring back at you all the time. Moon in Leo starts resenting Sun in Leo’s need for attention. Moon in Pisces starts steaming because Sun in Pisces is never home for dinner on time.
I'm sort of amused at this since my double Sadge friend is coming to visit...we're not conjunct, though.