Not My Fault

It's not my fault
My bones are small
My fat is rare
My height is tall

It's not my fault
I eat and eat
But weight just slips
Right through my feet

It's not my fault
I surpass thin
It's not a game
I never win

It's not my fault
So don't you frown
When I try but I
Can't keep it down

It's not my fault
I waste away
If you knew the truth
You wouldn't say