8 Amazing Facts about Marriage Over 75% of people who marry partners from an affair eventually divorce. Marrying younger than age 25 dramatically raises the divorce risk. Also, the divorce risk is higher when the woman is much older than the man, though the reverse isn’t as a strong factor. Eighty-five percent of couples have had premarital sex. The average married couple has sex 58 times per year, or slightly more than once a week. Just two years after marriage, an estimated 20% of couples make love fewer than 10 times in a year. Due to jobs, kids, TV, the Internet, hobbies, and home and family responsibilities, the average married couple spends just four minutes a day alone together. A person’s level of education influences the age at which they marry. Couples tend to marry later in states with higher numbers of college-educated adults, while the opposite is true for states with lower education levels. The probability of a first marriage ending in a divorce within 5 years is 20%, but the probability of a premarital cohabitation breaking up within 5 years is 49%. After 10 years, the probability of a first marriage ending is 33%, compared with 62% for cohabitations. Washington, D.C., has the lowest marriage rate in the nation. More than friendship, laughter, forgiveness, compatiblility, and sex — spouses name trust as the element crucial for a happy marriage.