This is a good synastry!It's a pity that we don't know his houses, but the way his planets fall is great for you.
1st and 2nd overlays are generally very good for marital relatinships.
His Moon/Venus is falling in your 3rd house and your DSC is in Gem.
Mars in 8th is a classical, very good overlay for sexual attraction and compatibility and Uranus in the 9th looks great for spiritual evolution and traveling all over the world
His Neptune on your 12th venus, with your Neptune there as well is in tune with your 12th house, plus your IC is in Pisces - it is a dreamy, romantic, otheworldy, yet intimate and familiar feeling for you. he may as well adore you with his Neptune on your Venus opp your Moon and squaring his - very very romantic fixed T/square, I adore it! It will give you long looong term romance and intimacy.
The castle is awesome, uniting his Mars opp saturn/Jupiter with this T/square and releasing in your Mars/Pluto/NN conjunction, a conjunction to die for when it comes to physical, raw, deep sexual attraction and compatibility, especially for a Scorpio Venus like yourself and a Mars sextile Pluto like him.
The Castle is completed by the blessed Venus Mars trine, with Neptune - long term romantic and erotic attraction and compatibility. The more dynamic aspects prevent it to become a routine, especially with Mars/Pluto and the Venus sq.
Your Moon/Mars trine is completed by him. And his Mars neptune Saturn Jupiter by your Moon.
His Uranus/Mercury trine is completed by your Saturn - you stabilize his mind, give him structure and purpose. The Saturn/Uranus trine is one of the best to have in a natal or synastry.
Both Saturns and Jupiter are very well aspected - Moons are connected and Sun trines Moon/Venus - plenty of good marital markers as well.
You have a mutual Mars/NN and his saturn sq your nodal axis, a classical marital aspect.
A fine combo of very strong marital, romantic and erotic aspects.
Good luck! Great synastry!
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I seem to have loved you in numberless forms...