I have a bit of a different perspective since I am not a Catholic yet but am starting to learn about Catholicism. I am currently non-denominational, but I’m waiting for RCIA to start and I have weekly meetings with a Deacon at my local Catholic church to discuss Catholicism. So far I have found certain things about Catholicism that I like, but others that have me concerned. One of which is the Catholic notion that any male ejaculation outside of the vagina is a mortal sin even if you’re married (Venial sin I might understand, but mortal? Really?). Protestants are virtually unanimous on the agreement that any sexual act within marriage is permissible so long as it’s consenting by both parties, and doesn’t involve bringing in more people (adultery) or pornography (lust). This is because the Bible never states that oral sex, anal sex (between heterosexual couples. What verses refer to sodomy are in the context of homosexuals only), manual stimulation (by the partner), or any other such like is a sin. The Bible says that a married couple will become one flesh, but it doesn’t say HOW they become one flesh. So my question is, what is the biblical basis for this seemingly rash judgement on the part of the Catholic church? I’ve seen other forum posts talking about “natural law” and saying that since such acts violate “natural law”, that’s what makes them sinful. So what is “natural law” to begin with, where is the concept of natural law mentioned or expressed in the bible, and what is the biblical basis for the Church’s interpretations of natural law? Furthermore, I discussed this topic with my Deacon briefly as well. He was confused, and said he had never heard of any specific Catholic doctrine regulating physical relations within marriage other than the above-mentioned examples of adultery and lust. He said to the affect of “We don’t tell married couples what to do in the bedroom. That’s between them and God.” So how could a Deacon not be aware of these restrictions, especially since he’s married?

  • so where did you hear/get the idea of mortal sin? – depperm Apr 19 '18 at 12:06
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    "So far I have found certain things about Catholicism that I Like..." Are you looking for a Religion that conforms to your Likes and dislikes? We are called to conform ourselves to God, not the other way around. Here is the Church's teaching regarding this, w2.vatican.va/content/paul-vi/en/encyclicals/documents/…. Your statement equating pornography with Lust seems vague as well. I would have trouble formulating an answer outside the encyclical. You will find, however, that the scripture addresses many of your dislikes. – Marc Apr 19 '18 at 12:10
  • This is really pretty broad. It seems you're asking (a) What is the biblical basis for saying that only vaginal sex without withdrawal is sinless, (b) what is natural law, (c) what is the biblical basis for saying that natural law exists, (d) how can this be true in light of the fact that an ordained minister of the Church doesn't know about it? Try focusing on one of these questions (and note that (b) is way broad). – Matt Gutting Apr 19 '18 at 13:00
  • I think this is a good bunch of questions, please narrow and/or ask multiple (also check to see if they've already been asked) I think the question in the Title is a good one. Don't conflate "Natural Law" with "Biblical Basis" though, that confuses the question and any potential answerers. – Peter Turner Apr 19 '18 at 14:19

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