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 Sextile Saturn
Your passion and desire to get things done will be focused and power a more cautious approach, allowing you to take charge and organize long term commitments and relationship goals. Your ability to overcome opposition turns to a willingness for hard work and a strong desire to doing things your own way. When the Mars person is sextile the Saturn person, they will focus more on opportunities to methodically manage your lives in order to achieve worthwhile and enduring material goals than on expressing their sexual desires, which may not leave as much room as you might like play or enjoying love's sensual pleasures.