Answer:
If you have me you want to share me. Once you share me you wonβt have me.
I am bought by the yard but worn by the foot
I don't live within a house nor do I live without. Most will use me when they come in and again when they go out.
You will always find me in the past. I can be created in the present, but the future can never taint me. What am I?
Drop me and the world will shatter. You can always find me where you empty your bladder. What am I?
I flow from the Homerβs mouth when he sees doughnuts.