When your partner lets you engage in anal intercourse, and cum inside them, and then let’s you do it a second time within the hour.
Polly likes it up the butt so much, she had me churning butter last night!
My wife gave me quite a surprise as I walked in on her in the doggystyle position, with her bootyhole covered in Vaseline. As she rubbed the tip of my hard cock around her butthole, she told me she was ready to churn chocolate butter.