Bald eagles usually mate for life.

Yesterday we interviewed Alison Tyler about her new book, Never Have the Same Sex Twice: A Guide for Couples. Today, you have a chance to win that book! To enter our Never Have the Same Sex Twice Contest, send your own "hot monogamy" tip to [email protected] with subject line "hot monogamy contest" by December 17th (make sure to include your mailing address, and how you'd like to be identified online). We'll post our favorites before the new year and the two best ones will each win a copy of Tyler's book. Because no New Year's resolution can top "Never have the same sex twice"...