No, at first impression (unless you look like a total player) girls say No because of a number of reasons, not the least of which includes:
Personal Preference in Looks
Style
Haircut
Shoes
Smell
Height
Weight
Posture
Poise
Collectiveness
Responsiveness
Politeness
General Relaxation
The list goes on... If you possess even one of these that she doesn't like, she will say No.