Every couple bickers about cleanliness. It’s inevitable that you’ll scold your partner for dirty underwear that’s been left on the floor for a week. But healthy couples understand that the underwear doesn’t represent anything. They don’t let it anger them in the same way infidelity or lying would anger them. Weak couples get into full-blown brawls over cleanliness issues. But cleanliness really shouldn’t warrant that degree of anger. If it does, there are deeper issues at work.