how maqny times can married couples make sex in a week

Title: "how maqny times can married couples make sex in a week"  Author: Unknown

Hello,
Iam a man who loves God and my wife. I would like someone to tell me how many times can a couple have sex in a week.I love sex but from my wife only. How does the Bible teach as concerning sex? Another question is that is it good to teach our children about sex and how do we do that and at what age? I would also like to know how to deal with infidelity which I think it's one thing breaking today's marriage..if you have video teaching I would like to have some so that we can share with my dear wife I hope. Since I will appreciate your help and may God bless you. What are the main marriage problems that the Bible has some solutions and which verses in particular?