1 Corinthians 7:4-5 The 'wife" does not have authority over her own body, but the 'husband' does. And LIKEWISE the 'husband' does not have authority over his own body, but the 'wife' does. Do Not Deprive one another, except for a time, that you may give yourselves to fasting and prayer; and come together again so that satan does not tempt you, because of your lack of self control.
The Scripture speaks for Itsself, however i might add that the Divinity of God cannot be mocked. Men and women come together as one in union, for procreation, and intimately in the futherance of the "Strenth" of their MARRIAGE. Children are Gifts from God, wether their human counter parts are interersted. You dont have to have or even want children to be married. Why would our Good Lord deny the essential intamacies of a marriage, to those who dont, or cant have kids?