I see it as an anal story, the awakening of a man's interest in well rounded rears, but not sure if he is a young man, or older, or what triggers the awakening.
It's the comment my crude new neighbor uses to compliment my wife when we have him over for dinner to welcome him to the neighborhood. She's deeply embarrassed about it at the table. And she rants furiously about it after he leaves.
But, I also notice her nipples harden both when he speaks the words and later when she recalls them.