To get close to another person'
s face and breathe on them in a nuzzling, snuffling sort of way.
The
trick to a good whuffle is to breathe in and out quickly, like a
dog smelling something really interesting. If you
like, every once in a while you can exhale forcefully to get rid of accumulated air, again, like a
dog will do. This usually makes the whufflee giggle. To make sexy whuffles, you go slower, on more sensitive parts of the face and neck. Include the ears, maybe lick the earlobe, and say "mmmmm".
See metachat.com