Operatic Breastfeeding?

Lately I've noticed that Sprout acts hungry, then once in my lap with a boob at the ready, he's more interested in singing or craning his neck to look around than actually breastfeeding. His 'singing' sounds a bit like a really long yawn with some tongue articulation: haaooooowwwooooowooooaaayyy leyaaaaayyyeyaaaay liduuurrrrrliduurrrr ngehhyaayaay geh. I can only transcribe it for those of you who aren't lucky enough to catch it in person. He always stops when I try to catch it on video, sneaky boy!

Update: finally caught him, though this is more of a conversation than the long, drawn-out notes he sings at least once or twice a day.