The primary purpose of the sexual act is procreation. Our modern culture has decieved us into believing that the primary purpose of sex is pleasure. A child should never be considered an unwanted by product of one's indulgence in self gradification.
Children are a gift from God. For the 18 years [give or take] children need the care of mature committed parents. Parents who are familiar with the term sacrifice. Parents who understand that children need physical, emotional, and spiritual needs met.
Anyone who is not ready to be responsible for the well being of a child, has no business engaging in sexual activity.
Christians are not to be ruled by their "feelings". Just because something feels good does not mean it is right for us to do. Anyone who has been married a while, will tell you that feelings come and go. The thing that keeps folks together is a commitment that transends feelings.
As a Christian, the thing that has kept my marrage together, is the fact that my vows were first made to God, and then my wife. Make it right with God, and God will keep it right with your partner. If it weren't for the Lord, my marrage would have ended years ago. But as we have work together in the sight of God, I can tell you it is better than it has ever been.