Let's take it from the top

• an already-chewed piece of gum
• a birthday present that’s had the wrapping paper torn off
• a rose with the petals all pulled off
• a used-up piece of scotch tape that has too much dirt and fuzz on it to be sticky anymore, thus no longer being usable or filling its purpose
• a candy bar that someone already licked and took a bite out of
• a delicate flower that’s been passed around a group of people and had its petals fondled, bruised, and torn
• a cookie that’s had pieces broken off

These are all comparisons I genuinely heard in conversations and youth talks or personally read in books as a teenager.