I think my friends logic behind the two being easier is that they don't want your attention all the time as one child usual does. They have a play mate other than mummy so you get a bit of "me" time. I don't really know as I only have one at the moment, would love a second, but hubby has said not now. He finds it really difficult to cope with just the one so I think he would have a nervous breakdown with 2. He works from home so is always here and DD loves to play with daddy but he is trying to work. So I'm hoping soon that I can convince him into another as DD is 3 years old and I really don't like the huge age gap between siblings. If not then I will only have the one.