1 Pet 3:7 "Giving honor to the wife as to the weaker vessel"

Wives are generally physically weaker than their husbands (though there are exceptions in a few couples and women have certain physical "strengths" superior to men). But they are certainly softer, more cuddly, and do not appreciate being slapped on the back! :-) So we should open doors for them, stand in front of them when there is a physical threat, carry the luggage, and do most of the heavy lifting!

Perhaps their monthly physical cycle could be viewed as producing regular physical weakness, and physical weakness provides opportunity for spiritual and emotional weakness, in my view. So special care should go towards them in view of this regular "weakness" (ἀσθενης - sickness. And that weakness is associated with one of their greatest roles... giving birth.

You may have noticed that the word "honor" means "value". Imparting value through showing them physical protection and physical comfort and care, builds that intimacy needed in prayers together as a couple. I must admit that I have often failed in these things, treating my wife too often like I want to be treated, like a slap on the back! :-) Doesn't work too well!