Ever since he was born, my son is used to sleeping without a pillow. I thought it was the right thing to do so his head will not get flat which is a common thing to happen with infants who can't move their heads yet. It worked well for us. As long as the bed is soft my son sleeps on it without asking for a pillow. Of course the husband doesn't agree to it but he doesn't have a choice :)
Last week though the husband gave his son a pillow. The little man didn't know what to do with it. It was fun looking at him trying to figure out what the pillow was for. Of course he didn't listen to his father when he was showed what it was for. A few days later though he started to use the pillow as his bed, lol. He sleeps on it. And when I say on it it means he lays his whole body on top of the pillow. And since he seems happy with it I am not going to get it from him. At least both my boys are happy.