Spirals - strength, or lack there of.

Makes you wonder: if you consider the EE breathing, you are breathing in through the nostrils, - two orifices, counter opposed, this would enable the fast flowing incoming air to contra-rotate and enter the lungs like a cloud-street of spiral vortices to energise the lungs, enabling the transfer of oxygen to the haemoglobin.
In exhaling through the mouth, the air is 'braided' and flows more slowly, meandering if you will, which is why it takes longer to exhale.
The exhaled breath is also warmer and heavier than the inhaled air (extra carbon atoms attached, as well as containing water vapour) so would have different dynamic properties.

Well.... in that vein of thinking, the same spiralling pattern is found in our urine flow.... Just saying.