Mars shows what a woman is attracted to in a man. Being with a man who is strong in her Mars element, or who makes close sextiles with her Mars, makes the relationship much easier, and increases sexual desire and compatibility. For a man, his Mars is part of his masculine nature, so it is best when his partner also relates well with this element.
Mars Inconjunct Jupiter
You have an optimistic approach, but much of your partnership is based upon an unrealistic belief in your capabilities together. Your approach to assertiveness, sexuality, and competition are very different from your partners approach. This will cause you to generate a lot of positive energy and expectations only to see them fall flat due to discouragement or poor timing. When the Mars person is inconjunct the Jupiter person, you will find yourself continually having to make adjustments to the way you carry out your plans in order to have even the smallest amount of expansion.