I've got nothing against sex. Trust me on that one.
The Bible does not say that they had a sexual relationship. If it was that clear, the Church wouldn't have universally taught, from the earliest times, that they didn't. If it were that clear, John Calvin, who was pretty unafraid of contradicting long-held Christian beliefs, wouldn't have believed that Mary was ever-virgin.
I have no beef with Protestants not believing the Orthodox accounts and traditions. Your opinions are intellectually valid, and I don't think you are somehow a bit dull for believing as you do. But statements like you just made imply that those who believe differently from you on this particular matter either a. can't read the Bible, or b. don't believe it.
I can, and I do. The various Protestant objections based on various Scriptures have mostly been answered elsewhere on this thread, and for anyone genuinely interested in understanding what we believe and why, the information is easily available on the Web these days.
And I'll leave it at that, because I'm not particularly fond of exchanges that don't involve any real discussion. I note that you still haven't given a well-thought-out, closely reasoned explanation for what monkfan first pointed out to you -- namely that there was no reason for a woman (certainly not a betrothed woman planning to get it on with her husband, as you presumably believe she was planning to do once she and Joseph got married) to be surprised by an angel telling her that she was going to conceive and have a child some point in the future -- surprised to the point of making bold actually to question an archangel as to how such a thing could be.
If you come up with a good response to monkfan, ping me so I can read it.
Matthew 1:24 Then Joseph being raised from sleep did as the angel of the Lord had bidden him, and took unto him his wife:
25 And knew her not till she had brought forth her firstborn son: and he called his name JESUS.