Research shows that couples who have a lot of similarities, including intellectual compatibility, end up staying together.

A world without love is a deadly place.

Touch is the mother of the senses. Not only are women more sensitive when they touch, but they're also more sensitive to being touched.

Men are so visual, they see a woman who appeals to them physically, and it will trigger the romantic love system faster.

Men tend to be hierarchical, but women are driven to make lateral connections so they can cooperate.

The only people you and I are likely to know in common are people in the news - politicians, journalists and celebrities.

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.