Sun Conjunct Neptune love Synastry ~ Intuitive Connection
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 Conjunct Neptune
A Sun conjunction Neptune aspect emphasizes intuitive, nonverbal levels of communication and understanding. It increases the creative imagination of both partners. With the Sun person conjunct the Neptune person this relationship could cause you to see more of what you want to see in your partner but it can also boost your intuitive awareness and sensitivity.