Online dating has evolved, but at what cost?

A new study finds an unexpected trait that young people want in a lifelong partner.

Have sexual interludes obscured the path to love?

Is high IQ really something that can genuinely turn people on? Apparently so — but only to a certain point. 

Dr. Gottman, a psychologist who studies relationships, explains the 5:1 rule.

One reason: women perceive men with tattoos as more likely to cheat.   

How open are you to your partner having sex with other people? The answer may depend on your age.

New research provides more clues about the age of the world's most popular book.