What are vaginas supposed to look like?

Now man i ask dis because my girlfriend and i were jus hangin u kno, and like i pulled her pants down and shi and like it was a little stub man. like i have never seen a puss before Eva and im 17 but like it was a little stub like my penis but cut down to like a cm. I didnt kno what to do so i just rubbed it,, i need help please next time what should i do wit her puss.?