...and here's the rest of it:
The sexual life of the ostrich, is hard to understand,
At the height of the mating season,
It buries its head in the sand.
And if another ostrich finds it,
Standing there with its ass in the air,
Does it have the urge to grind,
Or doesn't it bloody-well care?
Chorus*
In the process of civilization,
From anthropoid ape down to man,
It is generally held that the navy,
Has buggered whatever it can.
Yet recent extensive researches,
By Darwin and Huxley and Hall,
Have conclusively proven that the hedgehog,
Cannot be buggered at all.
Chorus*
We therefore believe our conclusion,
Is incontrovertibly shown,
That comparative safety on shipboard,
Is enjoyed by the hedgehog alone,
Why haven't they done it a Spithead,
As they have at Harvard and Yale,
And also at Oxford and Cambridge,
By shaving the spines off the tail?
(and an additional verse from Paul)
The sexual life of the bullfrog
Is hard to comprehend.
At the height of the mating season
He tries to *** his friend.
But his friend's posterior orifice
Is clogged up with mud and with slime,
Which accounts for the eyes of the bullfrog,
And why he goes "bleargh" all the time.