Sex
God created sex - and it's a good thing. God created it to be within the confines of marriage. He never intended it to be done outside of marriage.
Therefore a man shall leave his father and mother and embrace his wife. They become one flesh. - Genesis 2:24 MSG
Let him kiss me with the kisses of his mouth! For your love is better than wine. - Song of Solomon 1:2 NLV
But if they cannot exercise self-control, they should marry. For it is better to marry than to burn with passion. - 1 Corinthians 7:9 ESV
Let marriage be held in honor among all, and let the marriage bed be undefiled, for God will judge the sexually immoral and adulterous. - Hebrews 13:4 ESV