The Christian view of sex is far different than the other three predominant views in the world today. It doesn't say, "sex doesn't matter" like the licentious view; it doesn't say, "follow your desires" like the secular view; neither does it say, "squash your desires" like the legalistic view. The Christian view says, "channel your desires."
Sex is not insignificant, God, or gross. Rather, it is a divine gift to be enjoyed within the covenant of marriage between a man and a women. Anything outside of this is sexually immorality (porneia). We are to flee from sexual immorality because it's sin against God, against others, and even against ourselves. Surprisingly enough, the answer to sexual immorality is not sexual morality. Paul doesn’t simply say, “Flee from sexual immorality to a proper sexual ethic.” What does he say? Flee to Jesus! We don’t simply need a new morality; we need a new Master (vv. 19-20). We need to flee to the One to whom we belong. "You are not your own, you were bought with a price. So glorify God in your body" (vv. 20).
There at least two reasons that Jesus buying us on the cross helps us flee from sexual immorality: 1) it reveals where true joy can be found, and 2) it reveals where our true value can be located. Instead of looking for joy in sexual immorality, we can be assured that following Jesus' plan for sex will bring us the most joy. After all, He is so committed to our good He bought us back from sin and death with his own life. Instead of looking for our value in our sexual identity or activity, we can flee to Jesus knowing our ultimate value is in Him. He loves us deeply, and paid a high price to buy us back from our sin. "You were ransomed…not with perishable things such as silver or gold, but with the precious blood of Christ” (1 Peter 1:18-19).