Irvine Welsh with the same name in 2013. "Glue" (2001) was a return to the locations, themes and episodic form of "Trainspotting", telling the stories of four characters spanning several decades in their lives and the bonds that held them together. Having revisited some of them in passing in "Glue", Welsh brought most of the "Trainspotting" characters back for a sequel, "Porno", in 2002. In this book Welsh explores the impact of pornography on the individuals involved in producing it, as well as society as a whole, and the impact of ageing and maturity in individuals against their will. The book is
Rational addiction taken seriously as possibly true explanations and tools for welfare analysis despite being poorly interpreted, empirically unfalsifiable, and based on wildly inaccurate assumptions selectively justified by "ad hoc" stories." Research attempting to apply the rational addiction model to surveys of drug users have found the model inadequate to explain drug-taking behavior. Rational addiction Rational addiction is the hypothesis that addictions can be usefully modeled as specific kinds of rational, forward-looking, optimal consumption plans. The canonical theory comes from work done by Kevin M. Murphy and Gary S. Becker. A theory of addictions in the broad sense—for example, to heroin, tobacco,