My DS goes to sleep for DH by sitting on the bed while DH holds him and he drifts off to sleep. If I try it, he pushes away from me and screams and demands milk. I think they just associate different ways of going to sleep for different people. FWIW, neither one of us have been able to put him down awake and expect him to go to sleep on his own. He has to be DEAD asleep when we put him down, or when I roll away out of the bed after nursing, or he will wake up screaming.