#1. Women Aren't as Good at Math

This stereotype isn't as in-your-face as the others on the list, but it's there. If you look around at the people who hold most of the science, technology and engineering jobs in the world today, you'll quickly be tempted to ask, "Hey, where are all the chicks?" Anyone who's ever spent time around a college math lab, a corporate IT department or an engineering firm will notice a preponderance of dudes with skinny arms, ironic T-shirts and Tron collectibles.

#2.Only Women Suffer from Media-Perpetuated Body Issues

Women have been complaining forever about the impossibility of living up to the female body image that is presented in media. There are like eight billion periodicals marketed to women, and every one of them has some thin teenager with perfect teeth, huge boobs and no blemishes staring out from the cover--not just Martha Stewart Living. It's no wonder the grocery store checkout line is known as the "boner chute."

#3. Women Aren't as Horny as Men

When it comes to the topic of sex drive, everyone knows the stereotypes: Men are shameless swine who will nail anything with a pulse, and women are only interested in lovemaking that satisfies them on an emotional level.

Think back on your adolescence, and it seems self-evident, doesn't it? Boys are so sex-driven that they literally have to hide their protruding penises (penii?) with baggy jeans and Trapper Keepers. Girls rarely have that problem. And as adults, we all know that it's mostly men, not women, populating the porn-viewing public. The Kinsey Institute even says so. Obviously, men are much more interested in sex. Case closed.

When actually ...

Women are probably just as horny as men--they just don't want you to know it.

#4. Only Men Like Porn

The pimps who make up the advertising world have known for decades that the best way to catch a man's eye (and money) is with copious amounts of T&A. Men will line up to buy a large-caliber gunshot to the face as long as there's a scantily clad woman in a submissive pose somewhere telling them how awesome it's going to be.

But what about women? It's been widely believed that the fairer sex isn't affected by erotic imagery to the same degree that men are. And not just in advertising, but in movies, magazines or any other forms in which it might appear. Which is why you don't see half-naked beefcake flanking bottles of hair conditioner.

When actually ...

According to this study, women's brains react just as quickly to erotic images as men's do--and in fact the reaction may even be stronger.

They even use different "circuits" to process them as opposed to the pathways that are reserved for everyday images. Using EEG electrodes to monitor brain activity, researchers showed a group of female subjects pictures that ranged from pleasant to disturbing. Everything was cool until they got to photos that showed couples engaged in sensual poses.

Erotic images elicited neurons to fire at 160 milliseconds, which was 20 percent faster than even the quickest reactions to the non-erotic pictures--even if those pictures depicted immediate danger, like a snarling animal.