your way into her back door!

You lick your palm and rub the meager amount of saliva onto the head of your cock before you press it against its asshole.
"Wait, are you--" It starts to speak but you grab onto its hair and use it for leverage as you shove yourself into it and its question turns into a cry of pain.
"Please! Anh, stop," it says, "At least, agh, use some lube. It hurts!"