Evolution of a Marriage:
Engaged: He compliments her, looks her over, looks deeply into her eyes, holds her hand, sits close to her, whispers in her ear, talks to her, caresses her hair, touches her cheek, opens doors for her, does the heavy lifting, gingerly touches her buttons/bra, massages her with no agenda, listens to her, and makes out with her for long periods of time without necessarily going all the way.
She takes hours to get her appearance ready to see him. Keeps a hair style, curls/straightens/treats her hair, puts on make-up, uses fragrance, shaves/etc., accessorizes, does her nails, and buys clothes, shoes & accessories.
Newlywed: He does all of the above, plus touches her tenderly, takes his time, cuddles and finds ways to make sure she climaxes FIRST because that works best since a man's window of opportunity can be short once he starts, and also because his energy could be zapped after he is done.
She buys the groceries, cleans the house, cooks, does his laundry, organizes, and still usually maintains her work schedule outside the home. She no longer can spend hours getting ready to see him, because it's one thing for a single lady's apartment to get messy temporarily, but it is something else entirely to let a chores get backed up when two people are using the home.
5 Years: He lays on top of her and ruts, if anything.
She doesn't have time or interest in frivolity (her appearance) or sex. Even when they have sex, even if he remembers to keep up affection outside the bedroom (which is important to women's sexuality), and even if he remembers how her girl parts work for her pleasure, she nonetheless can't climax, because she is too tired and can't relax anyway, due to being a domestic servant as well as being employed.
Here are good articles:
http://theproblemismen.com/rants/bettersex This article gets better way down toward the end. Don't be fooled by stupid titles; it's a good read.
https://www.famifi.com/1884/20-ways-to-make-your-wife-fall-in-love-with-you-again