My own mother told me that co-sleeping would kill DS, in so many words. Also that demand feeding would kill me. I consigned both pieces of advice to the bin, where they belong.

Pre-DS, I had no idea about co-sleeping, even whether it was safe or not. Now I know better - but if I hadn't educated myself, I wouldn't. Some people don't educate themselves - not out of a love of ignorance, but because it doesn't seem important to their lives at the moment.