Answer:
A house full, a yard full, a chimney full, no one can get a spoonful.
If you break me, I do not stop working. If you touch me, I may be snared. If you lose me, nothing will matter.
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.
Upon me you can tread, though softly under cover. And I will take you places, that you have yet to discover. I'm high, and I'm low, though flat in the middle. And though a joy to the children, adults think of me little.
Stealthy as a shadow in the dead of night, cunning but affectionate if given a bite. Never owned but often loved. At my sport considered cruel, but that's because you never know me at all.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?