I have often been asked in ministry -- and I have heard it discussed many times: where does the Bible forbid sex before marriage? I myself have pointed people to Exodus 22:16:
"And when a man lures a virgin who is not betrothed, and lies with her, he shall surely pay her dowry for a wife to himself" (GLT).
"Suppose a young woman has never had sex and isn't engaged. If a man talks her into having sex, he must pay the bride price and marry her" (CEV).OBSERVATION: My own core concern would be this: if one has sex before marriage, and does not suffer harm as a result, this is the exception. It is not so much about the act itself as about everything that surrounds it. And so it is, I think, with much of the sexual advice in the Bible.