We'll begin with a box, the plural is boxes.
But the plural of ox is oxen, not oxes!
One fowl is a goose, and two are called geese,
Yet the plural of moose is never called meese.

You may find a lone mouse, or a house full of mice-
But the plural of house is houses, not hice!
The plural of man is always men,
But the plural of pan is never pen-

If I speak of a foot and you show me two feet,
And I give you a book, would a pair be a beek?
If one is a tooth and a whole set are teeth,
Why shouldn't two booths be called beeth?

If the singular's this and the plural is these-
Should the plural of kiss be ever called keese?

We speak of a brother and also of brethren-
But though we say mother, we never say methren;
Then the masculine pronouns are he, his, and him-
Now imagine the feminine- She- Shis and-Shim>

~ Anonymous.