The following are links to sermons which explain the Biblical teaching on marriage and give practical advice.
Marriage (Part 1)
Marriage (Part 2)
Marriage (Part 3)
Five Love Languages (Part 1) - Biblical Love in Marriage
Five Love Languages (Part 2) - Learning To Speak Your Spouse's Love Language
His Needs, Her Needs (Part 1) - Affection, Conversation
His Needs, Her Needs (Part 2) - Openness & Honesty, Financial Support
His Needs, Her Needs (Part 3) - Family Commitment, Sexual Fulfillment
His Needs, Her Needs (Part 4) - Recreational Companionship, An Attractive Wife, Domestic Support, Admiration
Adultery and Church Membership
Overcoming Pornography Addiction
Masturbation: What Saith the Scripture?
Should Christians Use Birth Control?
What Does God Consider to be Adultery?
What is Fornication?