I asked my husband to help me rub my back when I was taking a shower, but he refused to live or die, saying that he was uncomfortable doing so ~ ~

Everyone has different views on what to hide, which is understandable and acceptable.

I think he should be a little mentally handicapped, or have had bad experiences and shadows before. Bad things are always right anyway. As his wife, you should feel entitled to know, but everyone has their own injuries and pains. Is it necessary to know because you want to satisfy your thirst for knowledge or curiosity and uncover his scar again? Besides, this is not something that will endanger the quality of marriage.

Personally, I don't think it's necessary, but if you want to help him overcome it, you can see a psychologist. Of course, it's not a disease, just for a better solution. Don't tell him directly, let them be friends first, take your time and try not to hurt him. After all, he is the one you love! And take care of his feelings.