Helen Fisher said this quote

Men don't need linguistic talent, they just need courage and words.

~ Helen Fisher

If two very different people pool their DNA, they'll create more genetic variety, and their young will come to the job of parenting with a wider array of skills.

~ Helen Fisher

Both sexes like the exercise and challenge of sports, but for men it's also a basic display behavior for impressing and winning a mate.

~ Helen Fisher

Your sweetheart calls you by another's name. His eyes linger too long on your best friend. He talks with excitement about a girl at work. And the fire catches. Jealousy - that sickening combination of possessiveness, suspicion, rage, and humiliation - can overtake your mind and threaten your very core as you contemplate your rival.

~ Helen Fisher