Answer:
To you, rude would I never be, though I flag my tongue for all to see. What am I?
Blade to blade I always win My foe laid low and even. Yard by yard through thick and thin I'm busiest in season.
I walk on 4 legs in the morning 2 legs at noon and 3 legs at night.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.
I always go to bed with my shoes on. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?