Many have taught over the years that birth control is inappropriate or sinful in the marriage relationship. It is argued that marriage is for the purpose of procreation and that any attempts to circumvent this purpose violates God's command to “go forth and multiply.” (Gen. 1:28). Now read this:
1 Corinthians 7:2-3:
“…because of sexual immorality, let each man have his own wife, and let each woman have her own husband. Let the husband render to his wife the affection due her, and likewise also the wife to her husband.” (NKJ)
1 Timothy 4:1–3:
“Now the Spirit expressly says that in latter times some will depart from the faith, giving heed to deceiving spirits and doctrines of demons, speaking lies in hypocrisy, having their own conscience seared with a hot iron, forbidding to marry, and commanding to abstain from foods which God created to be received with thanksgiving by those who believe and know the truth.” (NKJ)
http://www.biblesearch.com/articles/article2.htmIf that doesn't work - have him read Song of Solomon. Here're the opening verses: (Pretty "hot" stuff!)
2Let him kiss me with the kisses of his mouth: for thy love is better than wine.
3Because of the savour of thy good ointments thy name is as ointment poured forth, therefore do the virgins love thee.
4Draw me, we will run after thee: the king hath brought me into his chambers: we will be glad and rejoice in thee, we will remember thy love more than wine: the upright love thee.
5I am black, but comely, O ye daughters of Jerusalem, as the tents of Kedar, as the curtains of Solomon.
6Look not upon me, because I am black, because the sun hath looked upon me: my mother's children were angry with me; they made me the keeper of the vineyards; but mine own vineyard have I not kept.
7Tell me, O thou whom my soul loveth, where thou feedest, where thou makest thy flock to rest at noon: for why should I be as one that turneth aside by the flocks of thy companions?
8If thou know not, O thou fairest among women, go thy way forth by the footsteps of the flock, and feed thy kids beside the shepherds' tents.
9I have compared thee, O my love, to a company of horses in Pharaoh's chariots.
10Thy cheeks are comely with rows of jewels, thy neck with chains of gold.
11We will make thee borders of gold with studs of silver.
12While the king sitteth at his table, my spikenard sendeth forth the smell thereof.
13A bundle of myrrh is my well-beloved unto me; he shall lie all night betwixt my breasts.
14My beloved is unto me as a cluster of camphire in the vineyards of Engedi.
15Behold, thou art fair, my love; behold, thou art fair; thou hast doves' eyes.
16Behold, thou art fair, my beloved, yea, pleasant: also our bed is green.