Thinking mumsnet could adapt this invention to be a 'father in bed' accessory. Same principle as attached but it would punch dad on the nose every time the baby cried....leaving no room for doubt about how many times Mum had been up in the night.
\link{http://news.bbc.co.uk/1/hi/world/asia-pacific/3699516.stm}
Not sure link will work...novice link maker.