Originally posted by ScantyNebula
victory! So it makes them smell better or something like that?
Yes, it gets "more" of the scent to them, so to speak. You know how sometimes you smell something and it smells just like something else tastes? ('course I can't think of a good example right now) Well it's something like that. They use both their noses and this Jacobsen's organ to get the full scent of things. Seems they only do it when they're really interested in a smell.

I think it's funny when they are smelling something like that, then turn away and are onto something else, but forget to close their mouths.