This one's the worst. This manipulation basically asks you to prove your love over and over again by giving your partner what they want. 'If you really loved me, you'd go to the store and get me some ice cream!' Or even, 'If you really loved me, you'd change your mind about having a baby.' This one uses guilt and emotion to try to prod or shame you into doing something. It's a form of manipulation no matter how innocent it sounds.