Jupiter has something Mercury needs, but it is not easy for Mercury to get what it needs from Jupiter.
This is a relationship that requires work on both parts, but if the willingness to do the work is there; this relationship is cleared for lift off.
Earth vs Fire - In this case, the elements are discordant and have a hard time accommodating one another, but the qualities are the same and the planets signify that there is something to be gained from this relationship.
Some Sagittarians boldly and creatively pursue their interests and produce works of genius, but the vast majority of men born under this sign believe that if they do what they like, luck, fortune, or their good karma will provide the rest.
He may see many of your sensible and practical ways as a subject of humor, but turn around and ask you for advice.
A Virgo Woman has a lot to teach a Sagittarius Man.
It's not unlikely that you are attracted to him because of his boundless enthusiasm and his awkward but adventurous spirit, and the honesty with which he speaks, whether he's trying to or not.
He may try to convince you to drop whatever you are doing and run off on an adventure with him.