A survey of 75,000 married couple found the top 5 things married couples fight about:
1. Chores. Experts say the best way to avoid that one is to just split them up 50/50. Or as close to it as possible.
2. The definition of "clean." Men and women don't always agree.
3. How often to have sex.
4. Using your phone too much.
5. What to spend money on.
Details on why here(Bustle)
Had to attach the infamous "The Notebook" fight scene below...