Power could hurt, it could also lead to conflicts or result in the violence when it is unequal. But the balanced of power between the partners and lovers is the warranty of the stable and strong union.
Only when two have strength and influence on the relationship it is a healthy relation without dominanation and misuse.
When each of two could propose and discuss, have time for their interests, have own space and a right to decide not only accept and humiliate, when there is a respect to other person and each has a power not a fear or dependency then there is a possibility for the develoment and success for the relationship and persons.
Hope all of us have healthy and happy relationships