It's like the old phrase with every act there's a reaction. In relationships and business people test each other to see how much you want that person or thing that badly that you succomb to their demands. If people shout at you, you will cry. If someone makes a complimentary joke you'll laugh.
If you're in a depressed mood and someone takes advantage of you, you'll get more depressed.
If you're in a depressed mood and someone takes advantage of you, you'll get more depressed.
