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

kit: Nuts For You by Kristmess Designs

full passage:

Let brotherly love continue. Do not neglect to show hospitality to strangers, for thereby some have entertained angels unawares. Remember those who are in prison, as though in prison with them, and those who are mistreated, since you also are in the body. Let marriage be held in honor among all, and let the marriage bed be undefiled, for God will judge the sexually immoral and adulterous. Keep your life free from love of money, and be content with what you have, for he has said, “I will never leave you nor forsake you.” So we can confidently say, “The Lord is my helper; I will not fear; what can man do to me?” Hebrews 13:1-6

As a review, sexual immorality is any sexual intimacy outside of that between a man and his wife. Period. All can be repented of and forgiven, but deliberately sinning is not a fruit of the Spirit. Please see my article "Do You Love Me?" or "Received with Gratitude" for more.