Christians I need your help! Adam, Eve, and Sex?

You are right and, with all due respect, the preachers who say sex in and of itself is a sin, are wrong. Your scriptural reasoning makes total sense. Why would God condemn the very process required in order to fulfill his command to fill the earth? It makes no sense. Not only that, some have also, wrongfully, adjusted that thinking to say that sex without PLANS to procreate is a sin. If you read some of the proverbs, you will find pretty clear advice to a young man to find sexual fulfillment ... enjoyment ... with his own wife and not with "a foreign woman". The bible is quite more balanced than many give it credit for.