And it's something to have such a very small flat
That nobody else can get in it.
But this is what causes such numbers of snails
To throw themselves into abysses:—
They are none of them born to be definite males
And none of them definite misses.
They cannot be certain which one of a pair
Is the Daddy and which is the Mummy;
And that must be even more awful to bear
Than walking about on your tummy.