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 Mercury
You will find yourself arguing and debating even the most trivial sexual and relationship matters with your romantic partner, not because you have a significant differences of opinion but because of how you attempt to communicate, your bluntness and poor sense of timing. You can find yourself forced to make constant adjustments because of your different approaches to action and ideas. When the Mars person is inconjunct the Mercury person, they will always be able to bring out your argument side, and you can find their ideas and abrupt or interrupting style of presentation a continuing source of friction.