Must be weird as Dr Google is unable to help! He's an obsessive tooth brusher btw, its not just his breath.
To start at the 'beginning', when i was pregnant with him and sense of smell increased, all DH smelt of was cheese. That's gone now, but since DS was born, i can always smell it when he's around (realise i probably sound a bit loopy!) if its relevant, he's a very warm child and very sweaty, though i can smell it even when he is fresh out of the bath!!
Noone else seems to be able to smell it, just to make me sound even crazier (perhaps i should have posted this in mental health...?)