I have a fairy by my side
Which says I must not sleep,
When once in pain I loudly cried
It said ‘You must not weep’.
If, full of mirth, I smile and grin,
It says ‘You must not laugh’;
When once I wished to drink some gin,
It said ‘You must not quaff’.
When once a meal I wished to taste
It said ‘You must not bite’,
When to the wars I went in haste
It said ‘You must not fight’.
‘What may I do?’ at length I cried,
Tired of the painful task.
The fairy quietly replied,
And said ‘You must not ask.’
(с)Л.Кэррол
навеяно http://diary.ru/~jkbunny/?comments&postid=4854286
оригинальный перевод, кстати, Маршака
Три очень милых феечки
Сидели на скамеечке
И, съев по булке с маслицем,
Успели так замаслиться,
Что мыли этих феечек
Из трех садовых леечек.