1. Sin of fornication
2. Sin of adultery
3. Sin of gossiping
4. Sin of lustful thinking
5. Sin of viewing pornography
6. Sin of bleaching the skin
7. Sin of piercing and tattooing of the body
Flee from all of them with all your might and spirit if you want to experience a good relationship with your lawfully wedded spouse or your fiancee or fiance and more importantly God.
There is nothing like sex sampling before you can know who is the right person for you.
Marry because you love and cherished him or her and not the physical look, why?
Because beauty fades with time but is the love that keep it going.