A Valentine Day's Special. Laurie Taylor explores changing attitudes to infidelity and considers a cross cultural history of rings. Wendy Doniger, Distinguished Service Professor of the History of Religions at the University of Chicago, asks why this piece of circular jewellery keeps re-occurring in myths and stories about seduction, love, sex and betrayal. What can it tell us about the shifting nature of power relations between men and women? She's joined by Adam Kuper, Visiting Professor in Anthropology at Boston University. Also, have attitudes hardened towards adultery? The visibility of non-monogamy suggests a challenge to dominant assumptions about the feasibility of lifelong sexual fidelity. However, infidelity remains the lone area of adult sexual practice that is disapproved of under any circumstances. Dr Jenny van Hooff, Senior Lecturer in Sociology at Manchester Metropolitan University, examines claims about the extent to which relationships have been de-traditionalised.

Producer: Jayne Egerton.