Here’s an article written by a Lutheran that talks about protestantism and contraception, it’s a very interesting read.
touchstonemag.com/archives/article.php?id=20-04-020-f
There are many quotes from the early church fathers which demonstrate that Christianity has always been against contraception. Contraception was not allowed by any Christian denomination until 1930. The act of Onan in Genesis has always been seen as a condemnation of contraception. Here’s what Luther and Calvin had to say about it:
Onan must have been a malicious and incorrigible scoundrel. This is a most disgraceful sin. It is far more atrocious than incest and adultery. We call it unchastity, yes, a Sodomitic sin. For Onan goes in to her; that is, he lies with her and copulates, and when it comes to the point of insemination, spills the semen, lest the woman conceive. Surely at such a time the order of nature established by God in procreation should be followed . . . He was inflamed with the basest spite and hatred . . . Consequently, he deserved to be killed by God. He committed an evil deed. Therefore God punished him . . . That worthless fellow . . . preferred polluting himself with a most disgraceful sin to raising up offspring for his brother. (Lectures on Genesis: Chapters 38-44; 1544; LW, 7, 20-21) – Martin Luther
“the voluntary spilling of semen outside of intercourse between man and woman is a monstrous thing. Deliberately to withdraw from coitus in order that semen may fall on the ground is doubly monstrous. For this is to extinguish the hope of the [human] race and to kill before he is born the hoped-for offspring.” – Martin Luther (Commentary on Genesis)
It is a horrible thing to pour out seed besides the intercourse of man and woman. Deliberately avoiding the intercourse, so that the seed drops on the ground, is doubly horrible. For this means that one quenches the hope of his family, and kills the son, which could be expected, before he is born . . . Moreover he [Onan] thus has, as much as was in his power, tried to destroy a part of the human race. When a woman in some way drives away the seed out the womb, through aids, then this is rightly seen as an unforgivable crime. (Commentary on Genesis [38])- John Calvin
I used to have trouble seeing the difference between NFP and artificial birth control, but I understand now. The analogy of eating food helps a lot to illustrate the point and I can try to explain if anyone is interested. I’ve also heard that there was a survey (idk which) taken that concluded that there is practically no difference between Catholics and non-Catholics in the use of contraception in the U.S. If that’s true then it’s very sad that American Catholics don’t even follow church teaching. Of course I’m not married so I don’t know the struggles of marriage so I don’t speak with experience.