Why are some guys SO passive?

I can't help but notice this trend of men expecting women to pursue them. Guys maybe aren't aware that females are taught to NOT pursue a guy, or else, they say, you are not respecting his need to be a real man, because you are acting as aggressor. But I find it funny that I know a lot of guys. Signs indicate they like me, but I don't ask men out, so it's like they are waiting for me to take charge. It's just not the kind of man that I want.

I also see this trend in professional situations, with men that I know so badly wanting to be involved on a certain project with me but then it comes out they were waiting for me to pursue them and 'hurt'' that I didn't ask them to get involved.

I just don't understand how some guys are so passive and want and need the woman to take charge.

I would love to hear responses from both sides on this :)
Why are some guys SO passive?
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