You give up to easy. While I agree with most of this ,there will be new technology that will provide some insights and break throughs. You can reduce odors and change the dynamics. Example is that a company in Europe has developed a product through careful research that will reduce breath odors.
I agree you have to start with the head but it can be done.
Here's some additional research concerning "The Skin Cells We Shed " by Dr. Ken Goldstein:
He relates the following in a graph
This was given to me by a bloodhound handler)
Sitting Quitely = 100,000 cells minimum
Walking 2.0 MPH = 5 Million + cells
Walking 3.3 MPH = 7.5 Million + cells
I have been able to verify this information but came from a training program the handler attended.
So where do we go from here. Give up ? Or seek to find some additional ways to improve our odds.