Answer:
Three little letters. A paradox to some. The worse that it is, the better it becomes.
I have legs but walk not, a strong back but work not. Two good arms but reach not. A seat but sit and tarry not.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.
What goes through a door but never goes in. And never comes out?
If you throw a bottle of wine, a carton of juice and a can of soda at someoneβs head, which one will hurt the least?
People take me on walks and I run and have fun. What am I?