Chicks hate pics of themselves

So I got this awesome new camera phone, and i decided to take advantage of the sick feature of pictures coming up when people call (their pic). So I've been going around and taking pictures of people on my contact list. But I have just run into a snag: chicks hate having their pictures taken. Just today when I was trying to take pics of two girls, they flat out refused to have thier pic taken. I just don't get it. Please stop bieng so self-consciouss. Please. You're probably really hot anyway.