BTW Hebrews 13:14 says nothing about the marriage bed. I think you meant Hebrews 13:4
Thanks for catching the typo. It was an honest slip up on the keyboard.
I went back and fixed the mistake in my post.
You said:
Also, it doesn't say that the marriage bed IS undefiled it says: Let the marriage bed be undefiled. Makes for a different interpretation.
The King James says,
"Marriage is honourable in all, and the bed undefiled: but whoremongers and adulterers God will judge." (Hebrews 13:4).
But even if you wanted to adhere to Modern Translations, they are saying the same thing as the KJV. One can simply read it the wrong way with a Modern Translation. But we know the contrast in this sentence is sex because it compares the bed of marriage undefiled vs. whoremongers and adulterers. God's design for sex was always one of his design within the bounds of marriage. Again, how do you regard the book of Solomon in the Bible? It's pretty steamy and reads a little like a romance novel. If things are as you say, then such a book would not exist in the Bible (But it does exist in the canon of Scripture).
It's just not in Solomon. You would have to tear out passages in the Proverbs, too.
18 "Let thy fountain be blessed: and rejoice with the wife of thy youth.
19 Let her be as the loving hind and pleasant roe; let her breasts satisfy thee at all times; and be thou ravished always with her love.
20 And why wilt thou, my son, be ravished with a strange woman, and embrace the bosom of a stranger?" (Proverbs 5:18-20).
Also, Genesis 2:24 says, "Therefore shall a man leave his father and his mother, and shall cleave unto his wife: and they shall be one flesh"
This is talking about sex.
For it is written elsewhere:
"What? know ye not that he which is joined to an harlot is one body? for two, saith he, shall be one flesh." (1 Corinthians 6:16).
The context is fornication (sex outside of marriage) (See: 1 Corinthians 6:13).
1 Corinthians 7:5 (NLT) says, "Do not deprive each other of sexual relations, unless you both agree to refrain from sexual intimacy for a limited time so you can give yourselves more completely to prayer. Afterward, you should come together again so that Satan won’t be able to tempt you because of your lack of self-control."
Note: The King James says devotion to fasting and prayer and fasting.
Anyways, if sex was impure, Paul would never tell the Corinthians to deprive each other of sexual relations unless that couple both agreed to refrain to devote each other more to prayer. It does not sound like your wife agrees with you. So do not force her to refrain. She is not ready for that yet.
You said:
What do you think undefiled means?
Undefiled means pure. Hebrews 13:4 is saying that the marriage bed is pure. If this was not the case, then God would have been telling mankind to sin by telling them to be fruitful and multiply to spread across the globe. You have a strong misunderstanding about sex. Sex within the bounds of marriage is pure and undefiled. Sex outside of marriage is impure. In order for sex within marriage to be a sin or is impure to God, you would need to prove that with the Bible. Nowhere is there any indication that such is the case. God designed the organs to be that way. Why would he make sex feel pleasurable if it was all impure? Did God make a mistake? Surely not. Even the animals of creation share in the same thing.