Now, the really cool thing about this particular love spell is that it implies an ethical approach to spell-casting. That implies an already existing bond, a level of personal trust. It implies consent.
Some persons believe in magick.
For those who do believe, magick has a real effect on the physical and spiritual realm. Many of the same principles of ethics apply equally to both magickal and non-magickal situations. Using magick on another person without that person's expressed consent is akin to practicing surgery without informed consent. No matter how strongly the surgeon considers the surgery to be in the best interests of the patient, the surgeon must have the informed consent of the patient. The surgeon can not force a person to have surgery.