title: A Hierarchical Model Might Cast Some Light on the Anomaly.
authors.affiliation: Department of Life, Health and Chemical Sciences, Open University, Milton Keynes, MK7 6AA, UK. F.Toates@Open.ac.uk.
authors.forename: Frederick
authors.initials: F
authors.lastname: Toates
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D012725:Sexual Behavior