I am honestly not really joking at all, just continuing on with describing things in a different vernacular.
Putting this all in spoiler tags to not blow up the thread, rambling autistic musings beyond here:
Of course not all men women whichever other genders and couples work precisely like this... but it is pretty common that they come pretty close.
Some women, people really, mostly hate shopping, but can handle it better with someone else they know and love, in at least some sense, present.
Some people mostly love shopping, and... also love it more when they are also doing so with someone they love.
I think roughly approximating this as stamina buffs is generally accurate, you could make it more complex by having some kind of 'shared time-o-meter', that also builds up XP, but differently according to the different builds (love languages/psych dispositions) of each partner.
And sure, yes you can absolutely continue this further:
Your base charisma stat kind of locks down certain dialogue options, but, as in video games, you may be able to improve that base stat, and you can also presumably spec down a more specific kind of speaking tree, certain vernaculars from fandoms or academic disciplines or sports or whatever, unlock new and varying context specific dialogue options and idle lines... have it synergize with that companionship skill tree, etc.
And you also could attempt to create an actual objective, but complex system of actually scoring 'fashion', giving a color coordinating score based off of color theory would... not be impossible...
... but... with many other aspects of fashion, it would basically have to be immensely complex, it would have to be very multidimensional, not just one monolithic score...
Maybe something closer to a system that attempts to classify and categorize fashion styles ... would be a better way of thinking of it, like a complex multifactorial personality test.
Hopefully that would allow people to ... actually be creative and mix and match styles or invent their own, instead of just totally locking them in to copying existing styles.