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 Pluto
A Sun sextile Pluto aspect is an opportunity for the two of you to explore one another's deepest fears, desires, motives. The intensity of your romantic and partnership bond can be felt by those around you. You are more powerful together and you may find that you need to be. Fate can have a way of introducing life changing events but your strength together lies in your ability to use these energies for personal transformation. Each test strengthens your commitment and brings you closer together. When the Sun person is sextile the Pluto person, both their strengths and weaknesses will work toward your personal transformation and a greater understanding of your spiritual potentials.