This question has probably come up in almost every relationship debate. Does body count really count? Some people believe it’s a big deal, while others think it’s just a number that shouldn’t matter.

Forbes contributors publish independent expert analyses and insights. I write about relationships, personality, and everyday psychology. The topic of sexual partners is something that sparks extremely ...

People often say the past matters in relationships—but new research suggests it may matter in surprisingly consistent ways. A large cross-cultural study published in Scientific Reports provides ...