"Your girlfriend's ass is a work of art, and you're about to create a masterpiece. With her on all fours, you spread her cheeks, revealing her puckered hole. You spit on it, rubbing the saliva in with your thumb. She tenses, but your reassuring words and the pleasure you've given her before help her relax. You press the head of your cock against her ass, feeling the resistance. With a steady push, you pop inside, her ass gripping you like a vice. You groan, starting a slow, deep rhythm, claiming her ass as you've claimed her pussy before."