R.E. Geffner, MD., holds a medical degree from the New Jersey School of Medicine. His other books, include "How to Keep Your Man, Th e Biology and Rhythm of Sexual Desire", "How to Provide and Protect Affection and Intimacy in Healthy Relationships", "Roles and Responsibilities in Healthy Relationships", "How, Why, and Where do Men and Women Cheat on Each Other?", "Dementia, A Relationship without Cognition.", "20 Reasons Why People Dump Each Other".