I do agree with Player_suprem. well, most of what he says. i just wanted to say that does not work on ALL women. it works like a wonder on young and *very feminine* babes, but i am pretty sure that there are a good percentage of women who wants a nice guy.
I like to believe (well, i don't like philosophy, so i stick to this simple explanation) that evolution and darwinism makes sure that the population is diversified enough so as to fight against nature. so, most of the chicks dig the agressive and strong male. it is a good criteria for his ability to survive. but there are some chicks who prefer (i mean, they are genetically programmed) quiet nice guys, because maybe these guys would survive, well let's say in a war, where every agressive man went to the front and died, whereas this nice guy fled away.
well anyway, those are the chicks we don't probably notice. they don't wear tight sexy pants or have those cool 95D boobs. they pick mr passive nice guy, they don't make such a fuss about relationship stuff, they just have a happy marriage and try to live quietly in a nice home.
generalisation is dangerous. alpha males exist, and so does mr shy guy. if shyness was against nature and mating, why would you think there are still a lot of passive guys everywhere in every country of this world ? Nature should have make sure that their *pvssy* characteristic, as you would call it, fade away.
actually, i think it's good to adapt your attitude. being an alpha male is the way to go in a work situation or nightclub or playing football. but there are times i just SHUT IT OFF, like when i have to free my mind or when i talk (open-hearted) to my best friends/wise people/family ... and being agrressive all the time puts a lot of tension.