The rigid, outdated biblical stance on sex outside of marriage is a prescription for sexual problems. Masturbation is forbidden, which create problems as it forces young people to marry quickly for sexual relief, often before they are mature and can make a rational choices, and without fully getting to know their partner. Also, many young women who do not masturbate do not know what turns them on, so will struggle reaching sexual climax, and their inexperienced partner often will not figure it out either.
If two people are sexually incompatible, they will not find out until after marriage, at which points they are stuck, trapped in an unfulfilling marriage. Prudish attitudes about sex keep people from enjoying their sexuality and finding a suitable partner. A fulfilling, vibrant sex life is possible for everyone, but not if they are taught that sex is dirty unless it is between two married people.