Well, I've been thinking about your posts.
Studying relationships, how we relate, the things that can get in the way (programs, trauma, conditioning), the languages of communication (attachment styles, love languages, personality types etc) is something that interests me a lot.
What is clear is that most things in life, we (everyone) don't have a clue - unless you've taken time to learn, and observe yourself and others.
The Work we are engaged in (of knowing the self, and the world) - studying human relationships (including our own) seems to be incredibly important. How can we learn about ourselves if we don't listen to others? Not blindly of course, but not dismissively either.
On that, one thing is clear from the romance novels and studying healthy relationship dynamics/tools - communication is the key to everything. Especially sex. What goes on in the bedroom should be considered a concentrated microcosm of your relationship as a whole.
That is:
Are there things that you don't discuss (in the bedroom, outside the bedroom related to the bedroom etc)?
Is it tense (sympathetic activation), dismissive/clingy (poor communication, attachment style issues), short, fraught (sympathetic activation), addictive/taking/performing for 'love/attention' (STS, dopamine dominance, cortisol, oxytocin suppression, attachment style issues - connected to all past programming, traumas, and not knowing yourself/others/how to communicate), uncomfortable (physically or emotionally), not something you want to do (hormone problems, past trauma/programming, physical issues), and overall generally unpleasant and to be avoided.
Or is it loving (oxytocin), giving (STO), kind (oxytocin), funny (vagal activation), passionate (correct hormone levels, emotional safety through good communication), sexy, playful/relaxed (parasympathetic activation), deep (proper bonding and healing), fulfilling, and full of desire (to know and be with your partner).
You can get a read on the whole relationship by the bedroom.
Ran across this today that goes into some detail on the above aspects. The video could even be considered an embodied example of a positive relationship, you can see it in the way the people in the video communicate - the nonverbal, the tone of voice etc