Even if couples make it past the selfish first stage and into stage two, "I'm here to serve my spouse," Bob Lepine says there's a third and even more profound stage of marital union.

According to Bob Lepine, marriages often begin with the misguided idea that "She's here to complete me." Bob Lepine describes what he calls the "Three Phases of Marriage."

Josh Mulvihill reminds parents that children learn what marriage is by watching them. Parents must start early teaching and modeling a biblical view of marriage for their children.

The Bible has plenty to say to your kids about sex and marriage, says author Josh Mulvihill. He also shares preventative measures parents need to consider to protect their children from exposure to porn.