His grandmother is washing him and his brother in the tub, and she's washing his butt, and he says to her, "When you're finished, kiss back there."

他祖母帮他擦屁股时，他兄弟也在浴缸里，他对祖母说，：,“洗完澡你要亲我的屁股，“

耶鲁公开课 - 1945年后的美国小说课程节选

So, stick margarine compared to tub margarine.

与软质人造黄油相比

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选