I think I've figured it out!
I think peoples (including one tall guy) are too far away from the ground. They don't smell all the good stuff that the puppies can. That may be why they are always walking away from the good smells!
So next time you're out on a walk and find a particularly good smell, make sure you roll around in it. That way when you get home, and are lying in bed next to your peoples and they say 'What in the HECK is that smell?', you will know they are thinking of you. Or maybe it's just the bean burrito they had for dinner.