So it’s time to take a look at your behavior and make sure you aren’t being a creeper.
On Male Privilege and Being Creepy

As I said last time, part of male privilege is all of the things that guys take for granted, like personal safety. Women, on the whole, don’t pose a physical threat to men; while there will always be individual exceptions, the average male is larger, stronger and heavier than the average woman. In practical terms, this means that the average man is fully capable of overpowering the average woman with relative ease… and women are very aware of this fact. Women have to gauge every interaction with men, especially men they don’t know, on whether or not he presents a threat to her. This is the unspoken subtext for every time a guy talks to a girl, sends a Facebook friend request or asks her out.

Just about every woman out there knows somebody -a friend, a family member, someone – in their immediate circle who has been threatened, taken advantage of or assaulted… if they haven’t been themselves. Think about that for a second.

Because women live in a state of near-constant threat awareness, they are far more cued in to the slight clues that hint at potential danger than guys are. Because the stakes are much higher for women than they are for men, women are more sensitized to these little hints, which can lead to false-positives. That guy who stares too hard and lingers around her long after he’s worn out his welcome may not actually intend to make her uncomfortable, but she has no way of knowing this; it’s far safer to allow for the wrong impression than it is to ignore the signs when someone actually does mean her harm.
"Ssssssso, do you want to come back to my car with me? Wait, put down the pepper ssssspray!"

Guys – who don’t have to do this mental calculus on an almost hourly basis – are frequently unaware of this issue. They’re often ignorant of just what it is they’re doing that sends all the wrong signals. In fact, because they don’t live with the same omnipresent threat that women do, they’re frequently offended by the idea that it’s their behavior that creeps girls out. Because they don’t (or won’t) address the issue, the behavior continues.

http://www.doctornerdlove.com/2011/12/dont-be-a-creeper/all/1/