How would I describe it? Intoxicating. The first girl (who is my wife) I ever fingered introduced me to that smell. Musky, somewhat like fish, but OMG, it drove me wild. I'm certain that I brought my finger to my nose after I fingered her to orgasm and the smell was just overwhelming - not in a bad way but in a way which stirred something inside of me, something primal.
Hell, when I would give her oral, I liked to get my mouth and the area around the mouth as sloppy as I can. And when I'm done, I don't wash my face. That way, I can get a whiff of that wonderful pussy smell or I can lick my upper lip with my tongue and enjoy a momentary reminder of the fantastic taste and smell.
My wife is post-menopausal so she doesn't get as wet as she used to but with a lot of foreplay, things get pretty lubricated and then, that smell .... ah.