Thank you! Thats exactly what Nick does and I think it is a cultural thing, although Bombilla may be able to say otherwise since they live fairly close. Nick was just raised to be that way, it has nothing to do with belittling women.
To clarify, the kind of behaviours you are referring to here are often charming (and yes, there is cultural resonance, given the area), the men have been brought up to extend courtesy in specific manners to women, and in no way do they intend to demean women by so acting. However, no man I was brought up with would have referred to his behaviour with women as being 'chivalrous', nor would he have related his behaviour to a feudal code of manners practiced by mercenary knights (unless he was being a tad more romantic and fantastical than most girls would have been comfortable with).
'Chivalry' bears a larger burden of meaning than just 'mannerly and helpful'. When Nick opens a door or walks on the outside of the sidewalk* or carries your parcels, he does so to be respectful, mannerly and helpful in the tradition of his (and my) culture.
When a knight of mediaeval England did the same, he was first following a code, second and most likely sucking up to some female relative of someone more powerful than he was, and often, thirdly, attempting to gain prestige by having as a lover the wife/daughter/sister of a powerful landowner. The same knight, the same day, was capable of running his horse over a peasant child in his way and raping a farmer's daughter caught working in the fields, without in any way thinking he had broken his vow to be 'chivalrous'.
So for many people who don't buy into romances about fantastical and purely imaginary Mediaeval courtesies, 'chivalry' is just a word that has connotations of dishonesty, of double-think. Words like
polite, mannerly, respectful, kind, charming and so on are, IMO, much better words to describe what Nick and men like him are really trying to be.
*Since there were no sidewalks in the community I grew up in, I first encountered that behaviour when I moved to the city, and found it hard to get used to, what with the fella jumping around every time we crossed a street. Also, given the conditions in Mediaeval times, placing the lady on the inside meant she was much more likely to be the one receiving the benefit of the flung contents of chamberpots from above. ;-)