Feederism (or feedism) is the term given to practices and relationships related to erotic weight gain. In its simplest form, feederism is about a feeder (a person who likes to see another person gain weight) and a feedee (a person who enjoys gaining weight). Following on from their Fringe talk for us, Mark Pentler spoke to Kathy Charles and Michael Palkowski about their research in this area.This work led to the release of a book on the subject, titled Feederism: Eating, Weight Gain and Sexual Pleasure, details of which can be foundhereon the Palgrave website. Kathy has been a lecturer at Edinburgh Napier University since 2007. She teaches undergraduate modules in forensic psychology and research methods, and she is the programme leader for the MSc in Applied Criminology and Forensic Psychology. Her research interests are in aversive personalities, unusual interests, and forensic interviewing. She is the director of studies for a PhD student researching aversive personalities. Her w...