God created sex but intended it for marriage. That is why every sexual act out of marriage always comes with the feelings of dirtiness, fear, guilt and shame.
“And they were both naked, the man and his wife, and were not ashamed.” – Genesis 2: 25
“A bundle of myrrh is my well-beloved unto me; he shall lie all night betwixt my breasts.” – Songs of Solomon 1: 13
“Marriage is honourable in all, and the bed undefiled: but whoremongers and adulterers God will judge.” – Hebrews 13: 4