Please read 1st Peter 3:7
The word weaker here in the Greek root carries the meaning of delicate as it is translated in the ISV. To go deep in understanding, it is like a rare expensive painting of a famous person like Picasso. If you have a Picasso painting at home it is very expensive, valuable. You are extra careful, dealing with it and you put it in the best place in the house. Husbands, if you do that with your wife daily, not only during the anniversary celebration, there will be no marital issues.