I shall quote..In a minute...
First, a technical reason. "Women's eyes have more rods then men, and as a result have better peripheral vision. They see better in the dark and take in more at a glance then men. Men have more cones then women, allowing them to see one segment of the visual field in greater detail with better depth perception then women."
In other words, as said...
"Examples of this physical difference could be..:
1. A man is walking down the street with a woman when he spots a beautiful vinetage Ford Mustang speeding by. He says 'Oh! Did you see that car?'. The woman looks confused. Her gaze takes in the whole street, all the cars, buildings and people moving. She can't pick out the car from everything else."
That's just one of many reasons.
There's of course, violence. The "Sexist" messages sent by the GTA and postal series. And the inappropiately dressed females in other such games.
Also, another thing...
You may notice that females tend to go for completly non-linear games such as The Sims. While males tend to be content with the more linear shooters (Sometimes).
'Course, games arn't targetting women anyway. Males are were the $$$ is at. 99% of the gaming population (Or to be realistic, 97.13%) are males. The game industry is completly biased towards the males.
That being said, it's more complicated then blood and gore.
But as the great Shocker98 said...
"Don't listen to me, i'm just a 13 year old child with no idea what he's talking about"