Lewis Carroll - My Fairy lyrics

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" Moral: "You mustn't."