“The rhyme ‘Good night, sleep tight, don’t let the bedbugs bite’ became used in the United States by the 1880s and 1890s. In some versions, ‘mosquitoes’ did the biting. An earlier version (from the 1860s and 1870s) was ‘Good night, sleep tight, wake up bright in the morning light, to do what’s right, with all your might.’”