You don't care how degrading this is, do you? You live for the feeling of shame and humiliation that comes with doing the depraved acts on yourself that you have done through every stage of these auditions. If you were braver, you would be a pornstar in films featuring dominant women, trannies or forced bi acts. Maybe you soon will be. Maybe you will be known for humiliating yourself for the whole world to see.
Take that finger that has been teasing you ass and suck on it so that it is wet. Can you taste the rim of your ass?
Once you've gotten your finger wet enough, reach down between your legs and stick it right up your asshole as far as it will go. There's no reason to start slowly. Simply thrust that single finger repeatedly into your sluthole as fast and as deep as you can for the next couple of minutes. As you do, watch closely in the mirror how your finger goes in and out of your hole.