Can too much sex ruin your relationship? And what you don't know about the “Big O” can wreck your relationship! These are a few of the topics covered in Marnia Robinson's new book "Cupid's Poisoned Arrow: From Habit to Harmony in Sexual Relationships".

Why are so many marriages and relationships failing? Why do friendships that turn into love affairs so often turn sour? Could it have something to do with our biology, the way we're wired, our chemical reactions to sexual stimulation? After a brief honeymoon period, the force that brings lovers together can also push them apart. The culprit is an ancient program in the mammalian part of the brain—Cupid's poisoned arrow. Partners can start to look to each other like that fifth slice of pizza. They may even wonder if they have fallen out of love.

By making love often, but smarter, mates can counter depression, anxiety, sexual frustration and disharmony--and tap into another ancient subconscious language that strengthens emotional bonds effortlessly.

The key to employing this other approach in the bedroom is to learn more about how orgasm affects the brain. Practical advice for couples? Start with daily skin-to-skin contact. Never try to push a partner into trying this. Just share the information. If possible, experiment with both approaches and watch for yourselves.

Conclusion: It’s really up to us whether we want to play along with a biological program that’s there to push us on to new partners…or learn the signals that help us get the most out of our existing relationships. Staying together can be a lot more effortless than we thought.

"Cupid’s Poisoned Arrow" contains new information (about how sex affects the brain), which supports an ancient approach to managing sexual relationships for greater harmony. It’s unique because it points out that what we thought was helping the harmony in relationships may actually be hurting it. It also contains an easy step-by-step program for those who want to experiment with the alternative.