Let's hear from Private Willis:

When all night long a chap remains
On sentry-go, to chase monotony
He exercises of his brains,
That is, assuming that he's got any.
Though never nurtured in the lap
Of luxury, yet I admonish you,
I am an intellectual chap,
And think of things that would astonish you.
I often think it's comical – Fal, lal, la!
How Nature always does contrive – Fal, lal, la!
That every boy and every gal
That's born into the world alive
Is either a little Liberal
Or else a little Conservative!
Fal, lal, la!