When you’re lying awake with a dismal headache Gilbert and Sullivan

(Recitative)
Love, unrequited, robs me of my rest:
Love, hopeless love, my ardent soul encumbers:
Love, nightmare-like, lies heavy on my chest
And weaves itself into my midnight slumbers!

(Song)
When you're lying awake
With a dismal headache
And repose is taboo'd by anxiety
I conceive you may use
Any language you choose
To indulge in, without impropriety;
For your brain is on fire
The bedclothes conspire
Of usual slumber to plunder you:
First your counterpane goes
And uncovers your toes
And your sheet slips demurely from under you;

Then the blanketing tickles
You feel like mixed pickles
So terribly sharp is the pricking
And you're hot, and you're cross
And you tumble and toss
Till there's nothing ‘twixt you and the ticking
Then the bedclothes all creep
To the ground in a heap
And you pick 'em all up in a tangle;
Next your pillow resigns
And politely declines
To remain at its usual angle!