Right think to urself, infact try; try and make a spoon smaller by putting it under stresses, you aint gonna shrink it. If you do its to an extent that would kill a human lol
Bone does not wear away like muscle, nor does it grow when you want it to like muscle does. Its fixed and can only go 1 way, bigger! and thats only if your pitaurity gland sends the hormone to the bones to tell them too.