How can we be fruitful and multiply if we don’t put the seed where it will grow?
Gen. 38:11-26 - Judah, like Onan, also rejected God’s command to keep up the family lineage, but he was not killed.
Deut. 25:7-10 - the penalty for refusing to keep up a family lineage is not death, like Onan received. Onan was killed for wasting seed.
The Early Church Fathers(notice what year)
“Because of its divine institution for the propagation of man, the seed is not to be vainly ejaculated, nor is it to be damaged, nor is it to be wasted” **Clement of Alexandria, The Instructor of Children 2:10:91:2 (A.D. 191). **
“To have coitus other than to procreate children is to do injury to nature.” **Clement of Alexandria, The Instructor of Children 2:10:95:3 (A.D. 191). **
"You [Manicheans] make your auditors adulterers of their wives when they take care lest the women with whom they copulate conceive. They take wives according to the laws of matrimony by tablets announcing that the marriage is contracted to procreate children; and then, fearing because of your law [against childbearing]…they copulate in a shameful union only to satisfy lust for their wives. They are unwilling to have children, on whose account alone marriages are made. How is it, then, that you are not those prohibiting marriage, as the apostle predicted of you so long ago [1 Tim. 4:1–4], when you try to take from marriage what marriage is? When this is taken away, husbands are shameful lovers, wives are harlots, bridal chambers are brothels, fathers-in-law are pimps.” **Augustine, Against Faustus 15:7 (A.D. 400). **
Scripture Catholic
scripturecatholic.com/contraception.html