A running list of how to define life stages that I have been collecting over time, some more serious than others:
Adulthood is when you can injure yourself while sleeping.
Adulthood is when you stop getting in line for concerts and you start getting in line for doctors.
Childhood is when your mind thinks something and your body does it better, Adolescence is when your mind thinks something and your body does it exactly as is, Adulthood is when your mind thinks something and your body does it worse, Elderhood is when your body does something you didn’t even told it to do.
Adulthood is when no one gives you homeworks, and yet homeworks never end