This is The Very First Thing Women Notice When They Check You Out

Sometimes she can't help but stare. Here's what turns her head - by Ali Eaves

Women aren’t immune to the involuntary double-take when a good-looking stranger walks by.

But what, exactly, catches her eye? Believe it or not, scientists have actually studied this.

Using technology that tracks eye movement, researchers are able to tell where ladies’ eyes linger when they look at a man. Plus, we’ve asked hundreds of Women’s Health readers: What’s the first thing you notice about a guy?

Watch the video above for the results of these important scientific endeavors.