Answer:
I am the kind of soda you must not drink. What am I?
No matter how hard you hit me, no matter how much I hurt, I'll always go for a laugh. What am I?
I go through a door but never go in and never come out.
You use me between your head and your toes the more I work the thinner I grow.
I work when I play and play when I work. What am I?
I flow from the Homerβs mouth when he sees doughnuts.