Award-winning neuroscientist David Linden shows how pleasure affects us at the most fundamental level, in our brains, and why ecstatic activities can easily become addictive. On this trip into cutting-edge science, he explores why nicotine and heroine are addictive while LSD is not; why the search for a safe appetitie suppressant has failed; if sex can be addicitve; and if we might someday control the part of the brain that makes us addicted in the first place.