Is it just the immature stomach valve thing?
DS2 is copiously sick (normally just after a grin so we're going 'Aww' before we get coated) loads and my washing pile is mounting.
He is huge and happy so I'm not really worried, just wondered why!
I do remember getting puked on by his big brother, but not this much. I think he grew out of it as he started sitting up, DS2 is 4.5 months so hopefully not too long...