Shove your toe into her. It's great, especially if she has a foot fetish.
Just kidding, it's a horrible thing and unless you are properly sanitized, your mate can get serious bacteria, as well as cuts from your toe.
Another thing, if you get into cunnilingus, work slowly and casually down to her...
Make her want you.
Another thing: Never slap her with your wiener. It is not only unpleasant for her but it will be embarrassing.