This is not a request for recommendations but to see if anyone else remembers what the one we had was that had one very inappropriate rhyming couplet.
Was trying to remember this for a friend yesterday. About 8 years ago we had a book we bought to prepare DC1 for the arrival of DC2. Somewhere in it it had a really dodgy bit that we found hilarious but I now can't quite remember. It rhymed "alright" and "tight" and it was something like the baby being alright because Mummy is nice and tight!
Came up in conversation yesterday with a friend who has a toddler and is due her second in a few weeks and just made me want to remember what it was.