Whats my partners desire nature like?

His mars is very confusing to me, I pictured mars in sagittarius as a very experimental, open, and friendly presence in the bedroom. He's very earthy instead, lots of routine (because of saturn in his 5th?). But maybe mars in sag doesnt turn off thier brain during sex, or they channel the energy into mental pursuits? mars in the 4th also throws me off, maybe it's a deeply emotional act for him but I'm not aware of it?. I'm not sure what type of energy will resonate with him sexually, or maybe, he's not a sexual person at all? I normally am really good at seeing into peoples psyches sexually (my moon/mars being in the 8th/pisces) but I really dont know what this person wants at all, and I'm not so sure he knows either.

Any insights are always greatly appreciated. Trying to connect his 6th house venus to his 4th house moon/mars conjunction is proving very difficult. Makes me feel like sex is more of a "service" than a fun, enjoyable, game of sorts for this individual.