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 Trine Sun
There is nothing to stop you or hold you back. A Mars trine Sun aspect makes it easy to master challenges, relate sexually, feel free with self expression, and cooperate toward mutual goals. When the Mars person is trine the Sun person you will find him/her responsive to your desires, encouraging you to go after what you want and dare to be your best.