Perry and I certainly have our sticking points. There are a few minefields in most happy homes. That is part of life. I have heard it said that couples who start out fighting fairly do best. Things are not swept under the rug.
Natural struggle is admitted and dealt with.
When there is a conspiracy of silence about differences, the marriage can explode one day with no possibility of healing. This happened to a couple I know. They were always the one couple who were happy, who got along, who seemed to have a solid marriage. But somewhere along the line, they stopped listening. They suppressed their confused feelings, their angers, their resentments and one day it all blew up.