New studies on religious tattoos explore the relation between faith and a practice associated with sex, drugs and copious amounts of alcohol. The results are mixed.

Comedian Henny Youngman observed, “The secret of a happy marriage remains a secret.” But several new studies indicate that cultivating practices such as selfless prayer, spiritual intimacy and compassionate love can help keep couples happily together through the challenges of marriage, from becoming parents to caring for one another amid the infirmities of old age.