Experience designers, product makers and marketers could be blamed for being master manipulators. After all, the digital products they create are so much part of our lives they often end up going to bed with us at night and are the first things we wake up with. In this talk, we'll explore how your biology predicts which products will be successful at engaging us and why we should avoid the dark arts of making our work addictive. By the end of the talk you'll know how and why your physiology interacts with digital products and what how you can use this in positive ways to improve your UX and design work.