NO you cannot!! Don’t even think about it. What type of a request is this? Whiter vaginas are for people who have white skin, we don’t. We are of dark complexion. So lets say you were to tell him he has a small penis, can he do something about it? No, right? So then why the demand on you? And maybe you should remember, that today its this, tomorrow something else, for how long will you keep doing things to please him?? If he is the guy who loves and respects your body for what it is, then he is the guy worth having intimate relations with, otherwise, reconsider. All the best.