Kid's shampoo does not get into the eye
Adult one does.
Kid's toothpaste is tasty. Adult one kinda burns.
For kids there are candy bars. For adults there are cigarettes.
For kids there is hot chocolate. For adults there's bitter black coffee.
For kids there are milkshakes. For adults there's alcohol that is bitter, burns, and leaves you nauseaus afterwards.
As a kid I've been frequently wondering, whether adult life really is all about giving up on what you really like and low-key accepting constant mild suffering.
As an adult I know the answer.