Infidelity is the most devastating rupture of trust in a marriage. How can you prevent this from happening? How do you "affair-proof" your marriage?

In this funny, insightful video, Emily Nagoski, a sex educator, draws on (somewhat surprising) research to reveal why some couples stop having sex while others keep up a connection for a lifetime.

One of the biggest myths about relationships is: once you fall in love, get married and build a life together, you automatically stay in love. The truth is: maintaining a marriage is work. Here are 3 keys to keep your relationship charged.