Public success is an important part of your potential lover's career, and you're able to offer them good advice about how to achieve that success. You two start out as lovers, but you quickly become involved in their career and in shaping their path toward success. You just really connect on that level; you identify with their public reputation in some way, and especially if the two of you are involved long-term, you love to play the role of their coordinator -- putting together dinner parties with important clients or other associates, and bonding together as a unit in public to put on a good face for the world.
You take your lover's ambitions on as your own personal cause; you know just what they need to achieve their goals, and how they should go about doing it. You talk a lot about your goals and you help each other develop a viable game plan. Networking is very effective as a couple; you introduce each other to important people and offer behind-the-scenes advice. Even if you don't have careers in similar fields, you still have a lot of commonality and mutual understanding when it comes to your ambitions. You're able to offer each other sound, practical advice, and you might even become each other's spokesperson in some way -- helping your lover to make the right impression or even speaking for them to other people.