Physical attraction is one of those “you know it when we see it” concepts. For instance, when you see that attractive guy standing in the checkout line, it's no surprise that you look twice. You see other women look at him too. What is it about him? Sure, you can say that the man is good-looking, but what does that mean exactly? What makes one person more physically attractive than another? When it comes to determining physical attraction, the answers aren’t always easy. ^_^