Courtesy of my dad. Apparently, babies are naturally awake and interested in learning. All. The. Time. If they sleep a lot, it is because you are ignoring them or (worse!) giving them dummies, and you are A. Neglectful. Mother.
Now, I have no babies (yet ... we'd like to), and dad is speaking re. my very pregnant SIL. Dad was not a stay-home dad, and consequently saw his own babies from around 6pm-8am and at weekends. However, were I SIL, my blood pressure would be none too healthy.
So, I just had to share because he drives me up the wall with the judginess and bizarre theories. He also came out with the gem 'Don't worry, I'm sure [SIL's name] will be fine, she's a bright girl - we won't need to correct her much'.

Come on then, share the mad or unspeakably irritating theories you've had flung at you before you had babies/when you were expecting, please!