Answer:
I am heavy forward but backward I am not. What am I?
I begin and have no end and I end all that begins. What am I?
I have feathers that help me fly; with head and body but I'm not alive. Very skinny and a fixed length how far I go depends on your strength.
Use me to reward good behavior.
What has a bottom at the top?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?