3.Equality
Equality is essential in a relationship.
Because while the feeling of superiority might taste good, the feeling of inferiority is as bitter as it can get. And none of you should know that taste. Ever.
Feeling inferior in a relationship destroys all the passion that was ever there and if you think about it, it’s a matter of respect after all.
If you respect your SO, you can never treat them unfair. Both of your should make the same amount of sacrifices, romantic gestures and any action for that matter.