Mothers aren't the only ones who are biologically adapted to respond to children. New research shows that dads who sleep near their children experience a drop in testosterone.
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For most men, turning 60 means a run towards retirement and lazy days at the club. For late-life fathers, it can mean sleepless nights, dirty nappies, the chance they won't be around to see their child finish school ... oh, and joy. By Fenella Souter.