good guess

I made a little contest to see who could guess what "twopuffsofair" refers to... so far I've received the following responses... all of which are incorrect:

1) "2 puffs so far represents 2 children so far"
2) "2 beautiful fair little girls"
3) "asthma, puffer"
4) "does it refer to pokemon?"
5) "puffs of air...i couldn't resist...is it in reference to the fleetingness of our lives?"
6) "method for cleaning your camera lens/sensor, etc."
7) "how to give air when doing CPR on an infant (5 compressions to 2 puffs of air)"
8) "when you go get your eyes checked at the optometrist they use a machine that puffs your eyes with air?"
9) "the two breaths that God breathed into you & Nancy and Jackie & Tasha to give you life (Gen2:7)?"

I particularly like number 7 (Jon Chant gets honourable mention), but it has absolutely nothing to do with that...

:)