When I heard the pun about the sleepless little person, I was un imp rest.
Drinking caffeine late at night could impregnate you! By artificial insomniation.
The insomniac stayed up late making a long list of to doze.
Insomnia cures are so common; they’re a dime a dozin’.
There’s a new hat that cures insomnia. It’s called the Slumbero.