The Sun is the source of all energies. These energies stimulate the activities of the houses occupied by the transiting Sun and reinforce or weaken the planetary effects, depending on the Sun's aspect to the natal planet. When the Sun transits an inner planet, it may trigger a dormant aspect between that inner planet and a slower moving outer planet. If a planet is being transited by another planet when it is being transited by the Sun, the effect of the transit is strengthened.
Sun Sextile Mars
A Sun sextile Mars aspect indicates that you will enjoy activities with your partner, starting new ventures, initiating team efforts. Your sexual life can be exciting. Each partner give the other confidence and increased vitality. When the Sun person is sextile the Mars person, they have a willingness to assist you by inspiration and material encouragement. Action and activities filled with friendly competition will play a large role in your life together. You can further each others professional goals and efforts towards self improvement.