The Message Version of the Bible puts it this way:
"There's more to sex than mere skin on skin. Sex is as much spiritual mystery as physical fact. As written in Scripture, 'The two become one.' Since we want to become spiritually one with the Master, we must not pursue the kind of sex that avoids commitment and intimacy, leaving us more lonely than ever—the kind of sex that can never "become one." There is a sense in which sexual sins are different from all others. In sexual sin we violate the sacredness of our own bodies, these bodies that were made for God-given and God-modeled love, for 'becoming one' with another. Or didn't you realize that your body is a sacred place, the place of the Holy Spirit? Don't you see that you can't live however you please, squandering what God paid such a high price for? The physical part of you is not some piece of property belonging to the spiritual part of you. God owns the whole works. So let people see God in and through your body."---I Corinthians 6:16-20(Message)
Oh...but if you need this presented another way...*this video will do it*:
THIS. WILL. DO. IT.