As a parent I must say he's not completely wrong. We have decided to not co-sleep, to not get stuck with this. But quite often my wife would fall asleep without putting the baby back to the crib. At which point the baby would not cry till the morning, unless a dirty nappy started itching.

Not a parent. Have spent a decent amount of time around children. Have stayed up all night watching the door of a hospital room while my sister co-slept with her newborn child, waking her up when the nurses jiggled the doorknob.

> Have stayed up all night watching the door of a hospital room while my sister co-slept with her newborn child, waking her up when the nurses jiggled the doorknob.

Why?

Co-sleeping was forbidden by hospital. If they'd seen her sleeping with the kid they would have observed her for the rest of the stay to make sure it didn't happen again. She disagreed with this rule, as did I.

Ah, the old "ignore the rules of the medical professionals" trick.