Prove what? You didn't point out what you disagreed with. The only thing I disagree with is that if sex was only for procreation why would God make it intimate, or feel good, or how the brain chemistry changes to mimic the use of a drug in a euphoria state of mind. The Song of Solomon sure doesn't sound like God designed sex for just procreation. It has a spiritual connection otherwise if it didn't it would just be like doing laundry. Otherwise it wouldn't have the emotional pain element when someone is caught in adultry or rape.
Can you prove by using Scripture, that sex is not for Procreation only?