This sweet baby smiles all of the time and drum-roll please.........he sleeps through the night. That's right! My 2 month old baby sleeps either 7 to 9 hour stretches each night, with the occasional "bad" night mixed in, where he sleeps 2 back to back 4 hour stretches. I've always heard fat babies sleep better, and he's proving the tale true. I also think that his love for his thumb helps him self soothe.