You know, my husband is also a physicist (he teaches it, and maths, but at his heart he is quantum physics and definitely made entirely of atoms) and his relationships are also simple.
He's incredibly tolerant and doesn't get caught up in grudges or retributions. Sure, some people are beneath him and he finds them intolerable, but drama, no. He doesn't get into a tizz over things.
Me and my Cancer moon and Libran sense of justice though - oof.
Starting to think hard science in the ticket. Who woulda thought...