Not always, but flexibility is surely required.
When one raises the other should keep quite
When both raises, they should not cross the border of discussion and enter the territory of argument.
When both keeps quite, they should not cross the border of trust and enter the territory of suspicion.
When it comes to prettiness, When you're in love physical beauty doesn't matter. Physical beauty just doesn't make any sense.
BTW, There's no superficial ego in love(relationship), it's just one soul which lives in two bodies.
When one doesn't feel this, it doesn't mean that they don't have love towards the other, It only means that they should work a little harder to discard individual own egoistic thoughts.