If someone hasn't been in a long term relationship, I can see the perspective.
*I* think they've been together so long, the excitement is weening (just like Maya & Stepan). That's not to say they don't love each other. They just don't bang as often as they use to. I will say as an RLC viewer for 3+ years, Paul has become less sexual (if that was possible) and appears to be more possessive. Setting aside the past month, Leora has been MORE sexual (as I see it). She masturbates more and dresses more provocative at home. That her attire doesn't give Paul a boner could be a medical issue on his part.