The chemistry between men and women is all about attraction, isn't it? It's been said that when a person feels attraction to another then nothing else really matters. At the same time, if a person does not feel attraction to another, then likewise, nothing else really matters. Being physically attractive, being rich or famous, being the right age all matter very little when attraction is present.

Attraction is the key and it is a strong emotion, in fact a combination of emotions that causes a person to want to pay attention to another. We seem to learn about it as children and then we become confused about it as adults.
More on Attraction in Men and Women: Teasing, Flirting, and Humor