It’s never too early or late to read.
When your child asks why you have replaced their Janet & John "Go Out to Play" with a David Sedaris book, explain to them that it's essential that they understand satire and dry humour.
"Dad, what is the difference between satire and dark humour?"
"Well, that's a good question. Satire would be someone making fun of me for being a parent."
"Why would they do that, Daddy?"
"Well, children are expensive. Having a baby could, ultimately, lead to bankruptcy and the person having a much poorer standard of living compared to not bringing a baby into the world. That is satire."
"Daddy, what if the parents had the baby but ate it for Christmas dinner? Then the parents would not only not go bankrupt and continue to have a decent standard of living, but eating the baby would save them having to buy a Christmas turkey for dinner."
"Good one, sweetheart. You've certainly got a handle on dark humour."
My dad encouraged me to read Joseph Heller's Catch-22 when I was knee-high to a grasshopper. So, I don't think you should blame me for being sarcastic or finding the funny in the darkest of things—blame him.
*Disclaimer* No children, adults or animals were harmed (or eaten) during the making of this post!