In every type of relationship looking for Win/Win solutions is the way to go. When the parties of a relationship Win, everybody is better off. When somebody Wins and the other loses, the loser will be injured one way or the other.
Covey explained in his book that highly effective people always strive for win/win transactions, which make it profitable for everybody to cooperate because all the parties are better off at the end.
A different result always will yield to: bad feelings, animosity, new enemies, hostility or defeat.
What makes you a highly effective people is the fact that you can multiply your allies not your enemies.