What is with girls shaving pubic hair?

I'm twenty years old and have been dating a girl steady for over a year. Neither of us shave our pubic hair, even though both of us in the past did. We both have had in the past with other people while we were shaven, but we agree that with that natural padding of hair is so much better as it increases the potency of her pheromones as well as increased sensitivity to the mail genitalia. The question I have is, why are so many people afraid of leaving it natural? It feels so much better that way and to me looks much better, as it is a sign that a man is making love to a woman, not a girl. Why do so many young teenage girls feel that they need to shave their pubic hair off? It doesn't make much sense to me.