10 Impossible Sex Positions (NSFWish)
You balance on one leg with the other extended in the air while he enters you standing up.
Why It's Impossible: Can you extend your leg that high in the air and balance without falling? Didn't think so. We'd be having to work on our flexibility for our entire lives to make this come true. Attempting The Ballerina unless you're "Black Swan" material would earn most of us a trip to the physical therapist … or worse.