marriage - a primer

What not to do 50+ years into a relationship...as recounted by Sister A:

Dad: (coming up the stairs with aggrieved expression and laundry in his arms) "P, I told you that I like the towels folded like this." [demonstrates origami-like towel folding technique]

Mom: (staring at dad for a loooong moment): "Ok, if it means that much to you, I'll do it your way... [upon hearing this part of the story the first time, I had the worrisome thought that mom was feeling MUCH sicker than she was letting on]

.....then I'll stab you at night" she finished.