Help pls. about cabbage leaf

[Chocola]

I'm newbie here and this is the first time I post.

Could you please explain about "under the cabbage leaf" in this text, it came from a novel. I think maybe it's about children story, isn't it.

here the text


She says, "Honey, tonight's the block party!" My mother always calls me Honey or Sweetie or Sugar. I think it's a subconscious effort to undo my diabetes. It's moments like these that make me wonder what cabbage leaf she found me under.

[David L.]

When young children ask parents, where do babies come from? rather than get into the area of 'the birds and the bees' at such an early age, the stock reply is, the stork brought you, or, we found you under a cabbage leaf.
Here, the author is describing his/her mother as treating him/her as still some kind of baby, so that if the author asked his mother, where do babies come from, she would still regard him/her as a child, her baby still, and so sweet, young and innocent as to tell him she found him/her under a cabbage leaf. The author is humourously accentuating that he/she does not have an adult to adult relationship with his/her mother.

[Chocola]

Thank you very much David L.